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What do the IXL Real-Time Diagnostic levels mean?

A student’s diagnostic level represents their working grade level. So a level of 400 represents a readiness to start working on 4th-grade skills, and a level of 450 means the student is about halfway through the 4th-grade curriculum. The two exceptions to this are preschool and kindergarten, which are represented by diagnostic levels of 0-50 and 50-100, respectively.

Student levels appear as a range of numbers when the Real-Time Diagnostic doesn’t have complete data yet. As students answer diagnostic questions, that range will shrink. Once the diagnostic has enough information it will pinpoint levels to a single number, represented by a star.