If your student is in a puzzle and idle for 10 minutes, they will be automatically taken back out into their dashboard and the time is not recorded. If the student needs a break, the student should click on the home button first. The recording will initiate when the student plays or answers the puzzles. To track your student's playtime, you can check the Playtime Analysis tab, just below the Elephant Age graph, the duration is by default set to Weekly, but you can switch that to Daily; then hover your mouse on bar graph to see the how much time was spent by the student on a specific date.