The Symphony Math assessments are Computer Adaptive Tests. This means that they do not determine mathematics learning levels based on a percentage of problems answered correctly as might be done on an end of chapter test in the classroom. Computer Adaptive Tests determine learning levels based on the difficulty level of problems that a student can reliably answer. Its possible that two grade three students both answered 70% of the problems they solved on an assessment. However, one student answered mostly first and second grade problems while the other student answered mostly third and fourth grade items. In this way the percent correct can be misleading, as it does not account for the level of difficulty of the problems that were answered at a rate of 70% correct.