◊ ACT-R

also according to 📝 Using a Model to Compute the Optimal Schedule of Practice (p. 3), the model differentiates between

1. declarative knowledge
2. ⬡ production rule
   • → which is interesting for just how different is fact learning (e.g. vocab) from stuff like uke chord switches﹖
   • → declarative learning

⊛ implement ACT-R algorithm