As parent, you need to log in your child's account, and click Report from top navigation or visit this link: https://problemsums.koobits.com/Report/HighScoreProficiencyReport.
There are 2 tabs on the Report page: High Score Report and % Proficiency Report.
High Score Report - This star system primarily focuses on a different criterion when it comes to rewarding users based on their performance in Self-Practice tasks. Users are awarded stars based on how they fare within sets of 10 questions.
% Proficiency Report - In this report, you can view all skill's mastery status and proficiency in details, coded by color based on proficiency indicators: Gold - Mastery; Green - Competent; Blue - Developing; Pink - Beginning.
In case you'd like to access the previous format of the Report page, you may tentatively use this link: https://problemsums.koobits.com/Report.