We now have some statistics for level four in ÖVA (review) and the progress is still very good! 😊
These are the results so far, during the current academic year, for all students in Sweden studying math using PM (pluggamatte.se).
The students review what they have learned in five levels. The duration between each repetition is at least 1-7-28-45-70 days.
Some students have thus recently reviewed something after a minimum duration of 1+7+28+45=81 days since they first learned that topic. And the memory consolidation curve continues to rise despite the practice sessions being significantly spaced out.
