![]() ![]() And some say it’s a welcome opening in what has been a near-monopoly over a required piece of technology for many high school students. Other school teachers I’ve talked to say they are impressed with the NumWorks’ speed and functionality when compared with other graphing calculators on the market. NumWorks calculators have one button both for negative numbers and subtraction. “Really, that’s the same thing mathematically,” he says, but if students hit the wrong button they can get a confusing error message. ![]() As an example, he points out that Texas Instruments calculators have both a negative button and a subtraction button. Popular graphing calculators can have a steep learning curve, according to Etzold. “Even the speed hasn’t gotten all that much better.” Mary’s Central High School in Bismarck, N.D. “The same calculator my sister used in the late ’90s is still pretty similar to what they use now in terms of its functionality,” says BJ Etzold, a math teacher at St. ![]()
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