Regularly answer questions about the learning material.

Ask yourself questions about the learning material. Reading the learning material and asking yourself questions about it is one of the best ways to learn. By regularly repeating the learning material, you forget it less quickly: your brain has to actively retrieve the information from your memory, which helps you remember it better. A good way to do this is, for example, using flashcards, creating your own test questions and answering them, or making your own quiz on a site or app.

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Carpenter, S. K., Pashler, H., Wixted, J. T., & Vul, E. (2008). The effects of tests on learning and forgetting. Memory & Cognition, 36(2), 438-448.

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Roediger, H. L., Putnam, A. L., & Smith, M. A. (2011). Ten benefits of testing and their applications to educational practice. In J. Mestre & B. Ross (Eds.), Psychology of learning and motivation: Cognition in education, (pp. 1-36). Oxford: Elsevier.