Skill InformationSelect the icon next to any skill to see relevant use statistics. The data displayed is based on every problem solved within that skill, all time.Average time to solve - The average time it takes a student to answer a question in this skill.Accuracy - The historical accuracy rate of every question answered in this skill. In the example above, 12,774,168 questions have been answered correctly out of 15,840,917 total, an accuracy rate of 80.6%.Easiest Problem - The historical accuracy rate of the “easiest” question in this skill. For the example above, the “easiest” question has an accuracy rate of about 90%.Median Problem - The historical accuracy rate of the “median” question in this skill. For the example above, the “median” question has an accuracy rate of about 82%.Hardest Problem - The historical accuracy rate of the “hardest” question in this skill. For the example above, the “hardest” question has an accuracy rate of about 66%., Math done right. Depth, clarity, and rigor. Built by teachers. Used by millions. For Teachers / Schools For Students, Math done rightReady to begin? Just click the 'Register' button. (You'll need a class code to create an account.).