[this page is still a big mess; these links are either articles or random blog posts I scavenged to assess the current stance on SRS protocols. I'll get back at this in due time; until then, well — ]

1. Building a better memory system
2. Effective learning: Twenty rules of formulating knowledge
3. gwern's article on spaced repetition
   1. extending flashcards to generate testing content
4. How to write good prompts: using spaced repetition to create understanding
5. Spaced Repetition for Efficient Learning
6. the working memory overload; a book vs. the internet in a nice bathtub metaphor

from Gwern's,

- the research favors questions which force the user to use their memory as much as possible; in descending order of preference:

- free recall

- short answers

- multiple-choice

- Cloze deletion

- recognition

- the most common mistakes with spaced repetition are

- formulating poor questions and answers

- assuming it will help you learn, as opposed to maintain and preserve what one already learned⁠. (It’s hard to learn from cards, but if you have learned something, it’s much easier to then devise a set of flashcards that will test your weak points.)