I thought this app was more elementary than for the middle school classroom. However, it does move into inequalities which is a stumbling block for middle schoolers.
It gets into parentheses and order of operations
Even includes approximately to, pi, and infinity.
I like the fact that after symbol and the definition, there are numerical examples to apply the concept to.
The quiz was a little long...50 questions.
Only 1 test
The app is FREE.
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