SM-2 Spaced Repetition (Anki), Weighted GPA & Pomodoro Studio (2026)

In SM-2, after the initial learning steps (`I(1) = 1 day`, `I(2) = 6 days`), subsequent intervals are computed as `I(n) = round(I(n-1) × EF)`, where `EF` is the card's Ease Factor (starting at `2.50` or `250%`). Rating a card affects `EF` via `EF' = EF + (0.1 - (5 - q) × (0.08 + (5 - q) × 0.02))`, clamped at a minimum of `1.30`.

In classic Anki SM-2, pressing 'Hard' reduces a card's Ease Factor by `0.15` (`-15%`) and pressing 'Again' reduces it by `0.20` (`-20%`), while pressing 'Good' leaves Ease unchanged (`+0.00`). Over months, difficult cards sink to the `1.30` floor and flood your daily queue. Modern FSRS (Free Spaced Repetition Scheduler) replaces static ease penalties with a three-component DSR (Difficulty, Stability, Retrievability) memory model.

If your current course grade is `C`, the final exam is worth weight `w` (expressed as a decimal from `0` to `1`), and your target overall course grade is `T`, the required final exam score `F` is: `F = (T - C × (1 - w)) / w`.

Unweighted GPA maps all courses to a strict `4.0` scale (`A = 4.0`, `B = 3.0`, `C = 2.0`) regardless of course difficulty. Weighted GPA adds quality-point bonuses for advanced rigor—typically `+0.5` for Honors (`A = 4.5`) and `+1.0` for AP, IB, or Dual Enrollment (`A = 5.0`)—weighted by each course's credit hours.

Cognitive psychology research (Roediger & Karpicke's testing effect) shows that actively retrieving information from memory strengthens synaptic retrieval pathways far more than passive highlighting, while 25-to-50-minute Pomodoro boundaries prevent vigilance decrement and working-memory saturation.