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Report Says Schools Need 100Mbps Per 1,000 Users

alphadogg writes "American schools need mega-broadband networks — and they need them soon, a new report says. Specifically, U.S. educational institutions will need networks that deliver broadband performance of 100Mbps for every 1,000 students and staff members in time for the 2014-15 school year. That's the conclusion reached by the State Educational Technology Directors Association. Why the need for speed? For one thing, more and more schools are using online textbooks and collaboration tools, said Christine Fox, director of educational leadership and research at SETDA. Broadband access must be 'ubiquitous' and 'robust,' she said, adding that schools should think of broadband as a 'necessary utility,' not as an add-on. The report, called 'The Broadband Imperative,' further suggests that schools should upgrade their networks to support speeds of 1Gbps per 1,000 users in five years."

45 of 292 comments (clear)

  1. Moar speed! by Sparticus789 · · Score: 3, Funny

    All the better to torrent with, my dear!

    --
    sudo make me a sandwich
  2. Caching? by Aviancer · · Score: 4, Insightful

    I suppose that local caching of something as relatively static as a textbook is out of the question? My dead-tree edition books were often cached for 5-20 years. Really, how frequently does arithmetic change from year to year? Literature? Science and "Social Studies" I buy as being a little more dynamic, but still within a year?

    1. Re:Caching? by skids · · Score: 3, Insightful

      That would be contrary to the whole "send it to the cloud" trending mentality, which is aimed at saving local-server tech support costs.

    2. Re:Caching? by betterunixthanunix · · Score: 4, Insightful

      I suppose that local caching of something as relatively static as a textbook is out of the question?

      How do you ensure that the recurring fees are being paid? After all, the point of online textbooks is to bring in money for textbook publishers; making information available to students is just an unfortunate side effect.

      --
      Palm trees and 8
    3. Re:Caching? by tepples · · Score: 2

      By dropping the non-free textbooks entirely and switching to freely licensed textbooks developed using resources provided by Wikimedia Foundation.

    4. Re:Caching? by betterunixthanunix · · Score: 4, Funny

      With that attitude, you would think that the point of textbooks is to pass knowledge on to other people, rather than to make money for textbook publishers...

      --
      Palm trees and 8
    5. Re:Caching? by ColdWetDog · · Score: 4, Funny

      It appears that you've gone off your meds again, number 980855.

      Please return to the reeducation cell immediately.

      --
      Faster! Faster! Faster would be better!
    6. Re:Caching? by Greenspark · · Score: 5, Interesting

      Aging textbooks were not old because they didn't need updating -- they were old because the publication, printing, and distribution an entire volume to modify a few elements was foolishly expensive. Therefore, textbooks were carefully written so as to exclude information that was would quickly become obsolete. We don't have to keep doing it that way. Examples can be current and relevant, and provide for a much more enriching experience. Links to web resources can be perpetually maintained. It's a very exciting new paradigm and we should be looking for ways to capitalize on its strengths rather than hobble it with the limitations of different media.

    7. Re:Caching? by a-zarkon! · · Score: 5, Interesting

      I have two children two years apart, in the public school system in the northeast US. Our school district is rated fairly well for the state, better than most but not as good as some.

      Now that the context is established, let me say that I have been shocked and somewhat dismayed to see the annual changes to curriculum and approach at the elementary school. While I do understand that gains have been made in understanding childhood development and education, I really struggle to understand this constant churn from year to year. The students struggle with it as well. This is particularly noticeable in basic approaches to reading, spelling, and math. As an example, one year the focus will be on memorizing a list of 10 words, spelling them, and using them in sentences. The next year, the spelling quizzes are gone completely. Maybe this is a response to the standardized testing regimen that all schools are focusing on, but I have a tough time not feeling like this is some kind of ill-considered trend-chasing experiment and our communities' children are the unwitting guinea pigs.

      While I'm in rant mode let me also express my surprise to find that precious little time is being spent on learning basic math facts. These children are being exposed to grouping, estimating, while they still don't know their basic addition/subtraction/multiplication/division tables. Having these facts committed to memory up front will save them a lot of time and effort down the road when they are trying to digest weightier subject matter. (Before you jump all over me, yes as a parent I have worked with my offspring to get them to know their math facts) Rote memorization may be boring, but it too is a skill that must be learned and why not learn it early on in the same way that's worked for at least the past 200 years? It's *not* broken!

      OK so now that the rant is over - yes, caching is good and should be encouraged. Even if the texts are changing daily or weekly and being served "from the cloud" - there are still major performance gains and efficiencies to be found on the network with a little simple cache engine.

    8. Re:Caching? by Anonymous Coward · · Score: 2, Informative

      The ability to update textbooks on the fly presents an opportunity for too much bias to enter into them.

      Last years updating crew really didn't like president X, and while they are professional enough to not write up a case study on libel, it's easy to see a bit of a slant one way or another.... only to be swung back the following year when a new editing crew comes on-board, and they really like president X, but hate president Y.

      Not to mention things that haven't entirely come to light. Should American history books include info about Stuxnet/Flame and our alleged involvement? Would anything have to be redacted a few years down the road? Keep textbooks on a 5+ year schedule at LEAST, so that enough time and peer review can be undergone for everything to be fully vetted by professionals. And that's just for Social Studies or other subject that are prone to change. How often do we really need to update our math books? Unless Euclid of Alexandria plans to rise from his grave and revise his (in)famous proof... I think we can keep Algebra course books static year in and year out.

    9. Re:Caching? by Shadow99_1 · · Score: 2

      Having spent five years as the IT head for a school district I can tell you that much of it is following the trends in their field. Real data is hard to find and does not in fact always go to plan when you try it on your district's children. So the administrators see a growing trend to teach in XYZ form and the given improvement can be 10-30%, so they opt to try XYZ at their school. A year is typical for any such thing, so even if it doesn't seem to be working for them they will continue it for that period and evaluate it during that time. At the end they may have seen a -10% change in their students which decries the trend and rather than continue with it to see if the change reverses (because the teacher(s) teaching to XYZ were new to it or any of a hundred things) they instead decide to try another trend, say KXT instead the next year to see what effect it has.

      Most of the gains and trends are caused by people looking at schools doing 'well' and trying to emulate them. However each group of children are different and respond differently, so the results vary. Three years ago I had looked at One-laptop per child programs and the reported stats varied all over the place. Some had 60% improvements in certain areas, others had neutral or slightly negative results. So when I discussed the topic I said that the highest gains are as much as 60% and the average was more like 10% with some results even being slightly negative. My CAO (Chief Academic Officer, equal to a superintendent) said "When you go in front of the board don't give them all that crap just say it's 60% gains! We would never get it approved if they didn't think this was the best course of action at least for the next year. After that we already have the stuff, so it doesn't matter."

      Btw on the whole caching issue, I can say I'd never have gotten funding for it. I couldn't even get them to replace a partial working (it would freeze once every 14 days and require a reboot). They don't see a reason for large expenses of cash. It however is much easier to say we need an 'X' increase a month for added bandwidth. My school district had a shared 3 MB connection and as they transitioned to more and more online based resources we could clearly all see the effects. I was advising we go above our basic needs to around a 20 MB connection (when what we needed was more like 10) for some future-proofing. However no one could offer us 20 or even 10 and so we went to 7 instead.

      --
      we are all invisible unless we choose otherwise
    10. Re:Caching? by dnahelicase · · Score: 2, Funny

      I suppose that local caching of something as relatively static as a textbook is out of the question? My dead-tree edition books were often cached for 5-20 years. Really, how frequently does arithmetic change from year to year? Literature? Science and "Social Studies" I buy as being a little more dynamic, but still within a year?

      I'm not the person that would ever use the term "rofl", but if I ever did, it would be about this comment.

      I find your rational thought and naivety amusing.

      Caching a textbook locally would require a huge license and licensing system, or would certainly be illegal. Are you a pirate? Pirates would think that they can make local copies for their own use and the use of others in the name of education, but they would be doing harm to the industry. (Potentially millions or even billions of dollars in harm.)

      Also, every textbook has to change every other year, or else the entire educational system dies. Everyone knows that. Being able to change every other week, while having an adjoining resources website, blog, and twitter feed will ensure that students are able to temporarily license access to this knowledge without any of the inherent evils that dead-tree format provided - such as copying, borrowing, reselling, or using once graduated.

  3. Re:100Mbps for..... text...books by betterunixthanunix · · Score: 4, Funny

    100Mbps for textbooks

    It's a new DRM system.

    --
    Palm trees and 8
  4. re: Moar by khasim · · Score: 5, Insightful

    From TFA:

    "Students shouldn't go to school and wonder if they turn on the light, is it going to dim the light in another room?" she said.

    Trust me. They won't even consider that possibility. It's only a problem when it affects them.

    Students also need to have access to broadband outside school, Fox said. "Students need to be able to leave school without wondering, 'Can I watch my teacher's algebra video when I get home?'" she said.

    And that is the core problem.

    The report, called " The Broadband Imperative," further suggests that schools should upgrade their networks to support speeds of 1Gbps per 1,000 users in five years.

    Do they have any idea what the price is for that kind of Internet connection?

    I'd be looking at huge caching servers first.

  5. Think, McFly... by Frosty+Piss · · Score: 2

    Um. If your text requires 100Mbps you're doing it wrong. Um. If your text requires 100Mbps you're doing it wrong.

    It's *not* a "text file". It's more likely a locked down PDF or a similarly "heavy" format.

    --
    If you want news from today, you have to come back tomorrow.
  6. Depends on Controls by Dakiraun · · Score: 5, Informative

    Speaking as a Network admin at a major university, the amount of bandwidth-per-user really depends on the levels of control the school is allowed (or willing) to apply to the user's Network usage.

    For example, in our residences, students are told they have unfiltered access to the Internet, as in, they are allowed to use any software they wish. The only stated restrictions are overall bandwidth related on a per-day basis. Behind the scenes, a we use packet shaping hardware to limit the total amount of per-user bandwidth usable for such things as P2P or VoIP (to prevent super-nodes) but otherwise leave it alone. In this model, 100Mbps per 1000 students is inadequate, but only just barely. We currently have it at approximately 120Mbps per 1000 students.

    Under tighter control circumstances, where P2P is disabled and/or other controls, caps, and so on are enacted, you can likely get away with less bandwidth. Other networks we distribute have such tighter controls, and allow us to dial the number down further to around 70Mbps per 1000 students (without any web censorship).

  7. Future Student Excuses by pkinetics · · Score: 4, Funny

    I submitted my homework, but the intertubes are full and until they are cleared you won't receive my homework.

  8. Requirements != Capability ~ Insanity by tiberus · · Score: 5, Interesting

    My wife is a kindergarten teacher. In order for her students to access the content she is required to teach them they must first logon to the machines in the computer lab. (I'll avoid a diatribe on the woes of the poor password practices they are forced to teach these minions...) It can often take 1/3 of her classes computer lab time just to log on; granted much of this wasted time is due to the fact that kindergarteners can't remember their passwords but, an equal amount is also caused by the lag caused when the network is flooded with their logon requests (she has less than 20 students).

    Once they've accomplished the herculean task of getting the little minions logged onto the lab computers the real fun begins. Most of the content is only available online from the publishers of the text books the school uses. Adding insult to injury the publishers sites are difficult to navigate often requiring the students to manually type in long cryptic URLs that would make torrent users eyes bleed. While much of the content is colorful, animated and has pleasing sound effects try and imagine what accessing this content is like on a network that can't handle a few dozen simultaneous logons.

    While I'm a fan of using online resources, the schools (as directed by their boards of education, county governments etc.) seem to have truly put the digital cart before the horse in the mad dash to move toward education online. Also without competent, which of course often means properly paid, tech support (she was once told by a tech the printer wouldn't print because she was using a japanese USB cable) adding bandwidth is pointless.

    1. Re:Requirements != Capability ~ Insanity by drinkypoo · · Score: 2

      Passwords for kindergarteners? Seriously? What ever happened to the guest account, virtualization, deepfreeze, anything?

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  9. Re:100Mbps for..... text...books by Jane+Q.+Public · · Score: 2

    What he said. "Textbooks" is really a misnomer these days. "Schoolbooks" should be used instead. Today's schoolbooks are typically full of color graphics. Have you looked at a math or physics book lately?

  10. Re: Moar by skids · · Score: 3, Informative

    Do they have any idea what the price is for that kind of Internet connection?

    When you get up to buying a gig, not as much /Mbps as the smaller allotments. But you are right, that would be a stretch for most institutions, mainly because their routers/firewalls/content-filtering/etc is not sized for the number of connections/pps that such a pipe would support. They'd be looking at a full re-buy and reprovisioning of their entire gateway path.

  11. Next up by jones_supa · · Score: 3, Funny

    Coming soon in Ask Slashdot: "I was assigned to set up a school network (about 100Mbps for 1000 users)..."

  12. Re: Moar by Anonymous Coward · · Score: 2, Insightful

    I would say caching servers is still doing it wrong. If thousands of students in a single building need access to "online textbooks and collaboration tools", why aren't those services hosted either on the premises or in some kind of colocation facility with a dedicated pipe?

  13. Ridiculous government waste as usual by Coolhand2120 · · Score: 2

    Rather than place what cannot be more than 10gb of textbooks for the whole school on a local server for students of the school, lets run $10,000/mo fiber to every classroom. The insanity of government waste obviously knows no bounds. The audacity of government "IT managers" is nauseating. What? Is everyone stupid now? We can't count? I know that textbooks don't require a 100 or 1000mbit connection! I don't care if you have 10,000 people per 100mbit! Get a fucking clue! Store commonly downloaded things localaly. Shit, you morons, put the fucking textbook on the local machine (DUH!). Since when is this moronic behavior acceptable?

    While Rome burns the ubermench in the government fiddle away with these "solutions". Now we'll be told for every dollar that we spend on this internet connection we can expect to see 1 trillion dollars in returns in as few as 5 years! Of course, as with every single estimate the government makes, it will be off by orders of magnitude and end up costing 1 trillion dollars in 2 years. At the end of the day I predict that the schools in question will have <10mbit connection at the price of 1000mbit connection, it will somehow drive up the price of internet service for everyone and increase educational spending greatly. All of which will have a negative impact on grades.

    And really, fellow geeks, who thinks that computers on a kids desk during class are anything but a huge distraction from learning? I know if I had a computer at my desk during school, I'd be all about hacking the shit outa that machine and 0% on the lesson. More than anyone, the government is bound by the law of unintended consequences.

    1. Re:Ridiculous government waste as usual by Bengie · · Score: 2

      And 90% of the USA lives within a densely populated city. Get a clue.

      This is why AT&T can claim it covers 90% of the USA while only covering 10% of the land.

  14. Re: Moar by wiedzmin · · Score: 4, Insightful

    I'd be looking at huge caching servers first.

    Christine Fox: "What's that?"

    Someone mod parent up. Their requirements clearly indicate the need to repeatedly access same content. Which means that you could cut your bandwidth usage by 999 times when that content, accessed by 1,000 students, is cached locally when the first student accesses it. Can you imagine the cost savings of such a responsible solution instead of knee-jerk response resulting in head-on capacity accommodation?

    --
    Bow before me, for I am root.
  15. Re:OMG Need More Moneyz! by alen · · Score: 4, Interesting

    and define the bottom 2%

    in NYC a teacher that teaches in one of the most elite schools in the city was ranked one of the worst. reason her kids didn't improve from last year. they are already the best in the city but because they didn't improve she's a bad teacher

    or what if all your kids never do homework and never study because their parents don't care?

  16. As a visitor to the US... by Anonymous Coward · · Score: 2, Informative

    As a visitor to the US (from Canada eh!) I think you are wasting your money.

    Your kids can not spell, can not do basic math, can barely print their own names.

    Your high school graduates are functionally illiterate: most can not spell well enough to use an online dictionary.

    Your educational system is fundamentally broken, and nobody is addressing it.

    If ignorance is bliss, you have the happiest students in the developed world.

  17. Re: Moar by Anonymous Coward · · Score: 5, Funny

    Because, The Cloud... It's always good!

  18. Re: Moar by pe1chl · · Score: 4, Interesting

    Today's content providers seem to jump through every possible hoop to defeat caching.
    You would think that a video provider would use some indirect URL to first log the access attempt and then point to a static location where the actual video is provided, and that can be cached locally, but no...
    In a new deployment, including a caching proxy probably is a waste.
    E.g. our existing proxy now has a byte-% hit ratio of 11%, falling all the time.

  19. Re:OMG Need More Moneyz! by lambent · · Score: 2

    the story you're referencing was a bit more nuanced than that. the students blew off a standardized test that didn't matter; that was part of it. also, she wasn't just ranked one of the worst. she was ranked the absolute worst teacher.

    amazing.

  20. Re: Moar by cpu6502 · · Score: 2

    >>> 'Can I watch my teacher's algebra video when I get home?'

    Aren't they exaggerating a bit? I watch hulu and youtube video with only 0.3 Mbit/s. It's called "video compression". So yes the student at home does need broadband to watch his teacher's video, but he doesn't need a monster amount. Comcast's or Verizon's Economy Service (1 to 1.5 Mbit/s) will provide more than the minimum.

    --
    My AC stalker: " I personally agree with your posts most of the time, but that won't keep me from modding you troll"
  21. Re:OMG Need More Moneyz! by YrWrstNtmr · · Score: 2

    Someone has to be at the bottom in each school. But the "bottom 2%" can't be by individual school, IMHO. You'd be getting rid of some good teachers. I'm sure that in some districts, the 'bottom 2%' in any particular school would be in the 'top 25%' of teachers in another school in the same district.

    So maybe cut/fire by district instead.

  22. Re: Moar by kenh · · Score: 4, Interesting

    My local school district has several Verizon FiOS 115 Mb/sec connections for the district of 4,000 K-12 students. It isn't that expensive, but it is essentially residential-grade service.

    They pay about $200/connection per month, probably $1K/month - much cheaper than the subsidized business class service the district had before, and much faster.

    Our in school wire network is Fast Ethernet to the desktop, Gigabit backbone.

    It was non-trivial to get this service at a public school, due to rate regulations.

    --
    Ken
  23. Re: Moar by MickyTheIdiot · · Score: 3, Insightful

    Sorry.. but this statement is just B.S. Apple IIs and TRaSh-80s were the gateway for hundreds of future computer users and programmers. Students learned TONS on them, though maybe not was initially intended.

    I agree with the point made often around here is that there is magical thinking when it comes to educational computer use. Today you need good guides. Computers in the classroom also mean something totally different when most homes have smart phones and PCs. However, you have to be careful... Apple IIs in schools enable a new era... it's not fair to say that they didn't. However, today kids already have already had the exposure to computers that the AppleII gave my generation so you need to take it to the next step and get under the hood.

  24. Re: Moar by PenquinCoder · · Score: 2

    A dedicated county/city wide server farm would probably be easier to manage and update than a per-school server rack.

  25. Apps by jmorris42 · · Score: 4, Insightful

    Thank HTML5 for the death of caching as much as the advertising.

    It is all apps now. And in schools they KNOW they are all incompetent boobs so they want nothing that requires skilled labor to maintain. So outsourcing is the word. Everything. Gradebooks, attendance, cafeteria manegement, email of course, Courseware, scheduling and calendaring, yearbooks. If it isn't being delivered from the cloud now it is because they are still fighting over which vendor they want to write a check to. (read as the bidding is still fierce over who will kick back more.. ok, I'm a cynic) That pattern means they need LOTS of bandwidth now and will need an ever growing amount going forward into an HD Video for everything future.

    And the vendors love it. It will of course drive lots of sales to schools themselves but when the kids can't do their homework without a constant high bandwidth connection it drives the 'Internet is a 'Right'' meme that leads to even more billions and billions of sweet sweet government money that will only be available to the politically connected.

    --
    Democrat delenda est
    1. Re:Apps by Phoobarnvaz · · Score: 4, Interesting

      Gradebooks, attendance, cafeteria manegement, email of course, Courseware, scheduling and calendaring, yearbooks. If it isn't being delivered from the cloud now it is because they are still fighting over which vendor they want to write a check to. (read as the bidding is still fierce over who will kick back more.. ok, I'm a cynic) That pattern means they need LOTS of bandwidth now and will need an ever growing amount going forward into an HD Video for everything future.

      Having subbed in many local schools throughout the years and reading an article like this...BULLSH!T! You want to know what your tax dollars are being wasted on? Every class which had an assignment and needed computers...the kids weren't doing their work...they were playing games (web-based)...using You Tube...going to ESPN...racing web sites and going to Facebook/other social media sites. Reminding these "little angels" they had work to do and that if they were in an actual job doing these things...they would be reprimanded or fired...I was informed their teacher doesn't care. I let the teacher/the principal/IT department know this was going on...I was the bad guy and told to mind my own business.

      This is what your tax money for education is going for. What a great use of our public resources.

      --
      Don't worry about the world coming to an end today. It's already tomorrow in Australia. - Charles M. Schulz
  26. Re: Moar by MickyTheIdiot · · Score: 2

    This requires organization. Good luck...

  27. Re: Moar by PCM2 · · Score: 4, Insightful

    Yeah, whoosh.

    --
    Breakfast served all day!
  28. Re: Moar by sdnoob · · Score: 2

    hmmm.

    SETDA is funded, in part, by the likes of Verizon, Comcast, Intel, HP, CDW, Microsoft and TI.. http://www.setda.org/web/guest/sponsors

  29. How the schools work by jmorris42 · · Score: 4, Informative

    > why would the school not upload to you tube?

    You obviously know nothing about the way schools work. There is an entire industry devoted to reinventing every wheel for educational use. Some of it makes some sense, schools have a lot of mandates for privacy and so on, but most of it is simply because. YouTube would be right out, a contract with an edu specific video hosting site would be required, and it would of course require a hefty annual contract with each school system. Each school would have to get a customized portal with the school logo, colors and such or it is a no sale. Access controls are a must. You can't put a picture that includes a student on a school's public facing website without moving a lot of paper for clearances.... meanwhile the local paper's website has the same photo from the game up that day and the kids themselves post everything onto their facebook pages in realtime. And it simply must be this way, the idea that it could be different could never occur. If nothing else, schools simply wouldn't be able to handle the concept of a vendor that doesn't charge.

    --
    Democrat delenda est
  30. Re:OMG Need More Moneyz! by DaFallus · · Score: 2

    or what if all your kids never do homework and never study because their parents don't care?

    In Texas, teachers get admonished for having more than a certain number of F's in their classes. It doesn't matter if all of your low grades are from kids who simply refuse to do any work, teachers will end up having to raise their grade averages to avoid being fired.

    --
    No one cares what your captcha was

    Houston TX, USA
  31. Re: Moar by LordLucless · · Score: 2

    Sorry.. but this statement is just B.S. Apple IIs and TRaSh-80s were the gateway for hundreds of future computer users and programmers. Students learned TONS on them, though maybe not was initially intended.

    Sort of. I was a student, and I learned tons on an early computer. It wasn't the computer in my school that we were allowed to access for one hour a week to play games on though. It was my computer at home. The limited access to computers at school, the limited amount of things you were allowed to do with them, and the limited knowledge of anyone in the school about them meant they taught me absolutely nothing.

    YMMV.

    --
    Just because you're paranoid doesn't mean there isn't an invisible demon about to eat your face
  32. Re:OMG Need More Moneyz! by LordLucless · · Score: 2

    Every time the notion of judging the performance of teachers by their output, exactly like EVERYONE else with a job is judged, promoted and fired

    Which industry do you work in? Because other than factory line workers and sales people, nobody I know is judged, promoted and fired like that. People I know are usually promoted/fired based on the opinion of their superiors on the quality of their work.

    Or is it your position that there is no reliably measurable difference between a 'good' and a 'bad' teacher?

    Pretty much. My position is that there is a difference between a good and bad teacher, but that it's not possible (or at least, simple) to reduce that difference to numbers in a way is both balanced across the different nature of classes, and impossible to game. It's a problem I find with most metrics other than the most simple of jobs.

    In the same way, I believe that there are good books and bad books, but judging the quality of the book by using, say, average number of syllables in a word, is a really poor way of doing it. When we want to judge the quality of a book, we rely on human opinions (reviewers). In the case of people, we should rely on the opinions of supervisors, who have a greater grasp on context than does an algorithmic metric.

    Which means it is useless. Mine is chosen almost entirely on the basis of being actually measurable and thus IS useful.

    Just being measurable doesn't make it useful. Lines of Code is a perfectly measurable metric, but still sucks when it comes to determining the productivity of a software developer.

    Come on over to the reality based community

    The reality is, you need to base decisions on personal observation, not on some clunky algorithm that doesn't produce the correct result.

    Really. How many other professions are there where the people in charge will openly assert that it is impossible to measure their output, immoral to even try.

    How many other professions are there where your output is entirely determined by a third party, over whom you have no authority? The ability of teachers to effectively control their students has been diminishing year by year. Many of the students know it too, and know that there'll be nobody in a school willing to call them out on their actions, for fear of legal liability.

    and oh, by the way we insist on being granted tenure even though the notion is utterly inapplicable to K-12 education

    I'm in a different country. We have the same current trend towards metrics, but none of our K-12 teachers have tenure, although, as government employees, teachers are just as difficult to fire as any other bureaucrat. I agree with you that the solution to the problem is getting rid of the under-performing teachers; I disagree that a simple mathematical formula is able to determine that accurately.

    --
    Just because you're paranoid doesn't mean there isn't an invisible demon about to eat your face