software > Spotter
Spotter is a program that lets students check their answers to math and science questions. It handles symbolic as well as numerical answers. The software is free and open source.
To try a demonstration of spotter, click here and follow the link to the demonstration.
If you're a student using my books who wants to use Spotter to check your answers to the problems, you can go ahead and do it without installing any special software, click here.
I got the idea for Spotter from LON-CAPA, which is also free and open-source. The programs are alike in some ways and different in others. There is another program called WeBWorK that also does similar things, and is also free and open-source.
doc.pdf -- documentation