RekenTest

RekenTest is open source educational software to practice arithmetic skills. It supports basic arithmetic operations like addition and subtraction, the muliplication tables and so on, as well as more advanced arithmetic operations like decimals, money problems, percentages and fractions. The software can be used for classes or as a homework helper. It has lots of options to create the lessons you want and lets you organize your classroom with tasks and groups. Available in the languages English, Spanish, Portuguese, Dutch and Turkish.