As a math teacher in the Spanish school, I like to support my lessons with self-correcting worksheets as complementary materials, mainly as homework.

Throughout the years I have developed a huge collection of worksheets. Before my students had smartphones with the internet, they were printable MS Word files made using Visual Basic macros.

Nowadays, I mainly develop lists of interactive online exercises like

http://www.toomates.net?a=9594

http://www.toomates.net?a=13440

http://www.toomates.net?a=14337

http://www.toomates.net?a=14609

http://www.toomates.net?a=13965

To make these compilations of exercises with the same pattern but different numbers I use Mathematica, exploiting all its simbolic and graphic potential.

You will find a different activity every time you click on it because they are, in fact, compilations of randomly generated exercises.

You can see all this stuff in my website www.toomates.net (more than 10000 free math resources, in catalan)

Anyone else have the same interest?