Top positive review
Great for High School Math!
Reviewed in the United States on September 24, 2017
***EDIT March 20, 2018 NumWorks has had several updates (now at version 1.3) in the last few months and I've upgraded it to 4 stars. Not yet perfect, but much more capable than it was. I've updated my review. ***
This is a fantastic scientific and graphing calculator. I am a high school math teacher, and I can now recommend it for all high school classes.
It performs basic calculations very nicely. I love how it gives both exact and approximate answers. Even with logs! Enter "log 49" and the response is "2 log(7) ~ 1.69196". Awesome! Would give students an unfair advantage, so I wouldn't allow this on a test!
NumWorks has become my go-to scientific calculator, as nearly every operation you want to do for high school math is available with a single key press (I get so tired of hitting the "2nd" key on my TI-84). Some actions need a "shift", such as absolute value and factorial, but it is really well designed to have common functions easily available. My biggest complaint is accessing the memory function. Unlike the TI products, you can't just press the "x" key, you must use a capital letter such as "X", available after pressing the alpha key and finding the proper letter, which as other have mentioned are nearly unreadable because yellow on white isn't enough contrast. Unless there's a shortcut I don't know about, it takes 7 key presses to store the number 6 in memory.
As a GRAPHING calculator, the NumWorks is now superb. It graphs quickly and beautifully. I love how it can auto-calculate the y values for the window -- setting the window size is faster than the TI. With the graph displayed, press the OK button to get a menu which will find intersections, zeros, min and max. There is a trace feature, but jumping to a specific x value isn't as easy as on the TI.
REGRESSION: Most students in the US now learn about regression and lines of best fit. The NumWorks performs a linear regression quite nicely. It's easy to enter and edit data, and the graph is easily displayed, both data points and line of best fit, with nice colors. The equation of the line of best fit is calculated along with the regression coefficient. The problem is that only linear regression is available. And while this is the only type of regression required by Common Core, I always introduce other types of regression (quadratic, exponential, etc.), as I like to model real-world phenomena. To me, this is the largest downfall of the NumWorks. Until it's provided, there are some nice online tools that do regression (Desmos, Wolfram Alpha, etc.).
I haven't touched the probability, sequences, or python part of the calculator so I can't comment on that.
In most ways, the NumWorks calculator surpasses its TI competitors, but it lacks important functionality with regression. Once this is provided, we'll have a 5-star calculator!