I have used both. I also occasionally read books on my laptop. For most purposes, the eInk readers are a lot easier to read than LCD displays. I prefer the Sony Reader. DRM is not that much of an issue to me because I generally buy or download my books from non-Sony sources, BUT--and this is a major point--if you are a Mac User (or a Linux user), I recommend the Kindle. Sony, in their infinite ignorance, does not support anything but Windows. The other factor that I would check on is how many books are available in your format. I know a few people who have said that they couldn't find certain books for the Kindle that are available for the PRS-505. Personally, I have had the opposite results. One device that might bear watching is the OLPC computer because it offers the best of both worlds--it is a color display until you turn the brightness all the way down, and then it becomes a reflective gray scale display.
Here's a little secret that most math teacher should know, but don't seem to: If you know your arithmetic, you've already learned the hardest part of math. Everything else is just puzzles and game solving. Why teachers insist on making things like Algebra, Geometry, and Trig seem difficult is beyond me. Just think of them as games. It makes them a lot easier to learn and practice.
JM
The two words are interchangeable. The original term was card sharp (or, later, cardsharp). It meant someone who cheated at cards. If you look in an older dictionary, you will only find cardsharp.
The term "shark" was already in use to mean someone who preys on people (like a loan shark) so it was just a matter of time before people started confusing the two. Since the term still worked, it stuck. Today, both are acceptable and both are found in dictionaries. There is no appreciable difference in meaning. Whether you are a cardsharp or a card shark, you are still a shifty character.
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I have used both. I also occasionally read books on my laptop. For most purposes, the eInk readers are a lot easier to read than LCD displays. I prefer the Sony Reader. DRM is not that much of an issue to me because I generally buy or download my books from non-Sony sources, BUT--and this is a major point--if you are a Mac User (or a Linux user), I recommend the Kindle. Sony, in their infinite ignorance, does not support anything but Windows. The other factor that I would check on is how many books are available in your format. I know a few people who have said that they couldn't find certain books for the Kindle that are available for the PRS-505. Personally, I have had the opposite results. One device that might bear watching is the OLPC computer because it offers the best of both worlds--it is a color display until you turn the brightness all the way down, and then it becomes a reflective gray scale display.
Here's a little secret that most math teacher should know, but don't seem to: If you know your arithmetic, you've already learned the hardest part of math. Everything else is just puzzles and game solving. Why teachers insist on making things like Algebra, Geometry, and Trig seem difficult is beyond me. Just think of them as games. It makes them a lot easier to learn and practice. JM
The two words are interchangeable. The original term was card sharp (or, later, cardsharp). It meant someone who cheated at cards. If you look in an older dictionary, you will only find cardsharp. The term "shark" was already in use to mean someone who preys on people (like a loan shark) so it was just a matter of time before people started confusing the two. Since the term still worked, it stuck. Today, both are acceptable and both are found in dictionaries. There is no appreciable difference in meaning. Whether you are a cardsharp or a card shark, you are still a shifty character.