Perhaps both together. [1]: https://www.scientificamerican.com/article/the-interleaving-effect-mixing-it-up-boosts-learning/ https://www.scientificamerican.com

Perhaps both together. [1]: https://www.scientificamerican.com/article/the-interleaving-effect-mixing-it-up-boosts-learning/ https://www.scientificamerican.com/article/the-interleaving-...