Summary: I use these exclusively in my classroom. I'm clumsy (so are my 8th graders) and the calculators stand up to being dropped from my classroom tables. The display is one of the best I've seen, without losing any of it's quality over time like many inexpensive calculators do.
Summary: Finally a calculator that works on good old energy froma battery---instead of solar powere that runs out when yhou need it. It's 3x as fast as my solar powered one. I got tired of not having a reliable calculator.