Which analytics metric is MOST valuable for predicting long-term retention in mathematics learning subscription platforms?

Subscription-based learning platforms have revolutionized mathematics education. Behind successful math learning platforms are sophisticated analytics that help product teams optimize content and learning pathways. This poll tests your knowledge about the specific metrics that drive product decisions in mathematics education subscription services.

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Weekly active problem-solving sessions (time spent actively working through problems rather than passively watching tutorials)
Total content consumed (number of videos watched or lessons completed)
Number of correct answers submitted in quizzes and assessments
Frequency of login sessions (regardless of activity type)