IXL's SmartScore is a dynamic measure of progress towards mastery, rather than a percentage grade. It tracks your skill level as you tackle progressively more difficult questions. Consistently answer questions correctly to reach excellence (90), or conquer the Challenge Zone to achieve mastery (100...
There were 44 test items for 3rd grade students, 56 for 4th grade students, and 61 for 5th and 6th grade students. We used 56 items for 4th grade students to compare the test scores of 4th and 5th grade students. We checked the characteristics of 56 math items in relation to their dif...