This is one of the most useful metrics on Atom as it accounts for the difficulty of the questions a child is answering, rather than raw accuracy.
The student score indicates the likelihood that a student will be able to answer an average difficulty level question correctly. It is expressed as a percentage out of 100 where 50% is the mid-point. This means that a child with a score of 50 has a 50/50 chance of correctly answering a question of average difficulty.
For example, if Sam has a score of 57.8 in English, he has a 57.8% chance of getting an average-difficulty English question correct.
This statistic helps us understand a the difference in student ability when using an adaptive platform. Two pupils may have answered 70% of their questions correctly, but one may have seen harder questions and the other may have seen easier questions. The former will have a higher student score, and the latter a lower one.
The student score gives you a more accurate sense of a child’s understanding of an assignment as it takes into account both how many questions were answered correctly and how difficult those questions were.
As the Student Score is the likelihood (out of 100) that a student will correctly answer a question of average difficulty, it can never be 100, as we can never 100% guarantee that a student will get a question correct.