Interactivate is a suite of fifty-nine interactive mathematics assessments. These assessments allow users to track their percentage of correct and incorrect responses on each activity. Most assessments are designed for individual use although there are some activities that can be used by multiple users. Interactivate is produced by the non-profit organization Shodor.

Applications for Education
Most of the assessments on Interactivate are appropriate for middle school and high school use. The assessments could be used at the beginning of a course to assess your students’ prior knowledge. The assessments could also be used to check for comprehension at the conclussion of a day’s lesson.

Here are some related resources that may be of interest to you:
Math Links You Might Have Missed
StatPlot – Graphs for Sports
Decimal Squares – Games for Learning Place Values