This is iStoa software web site. It is a free software project, GPL licensed, to produce a set of interactive activities to play with mathematics.
It contents is currently targeting grade 1 but we want to develop it for more grades.
As every free software, people are welcome to participate and to contribute in a way that fit each one competences.

You enjoy using iStoa. You like it to be a free software. You want more developments, more interactive activities to be developped.
Read how you can help with a small donation!
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