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TextPrep is built on two of the most thoroughly tested ideas in learning research: studying a little at a time across many days, and practicing by answering questions instead of re-reading notes. When researchers compare common study methods head to head, these two come out on top.
The spacing effect, also called spaced repetition, is one of the most replicated findings in memory research, and the advantage grows the longer the gap before your test. A daily question that runs right up to test day is built for exactly that.
When researchers meta-analyzed ten common study techniques, practice testing and spacing ranked at the top, while re-reading and highlighting landed near the bottom. Pulling an answer out of memory, then seeing the correct one, is that high-value version, and every TextPrep question comes with the feedback that multiplies it.
The two are strongest together: researchers call it spaced retrieval practice. A retrieval question, with feedback, spaced a day apart. That, in one line, is exactly what TextPrep does.
1 Cepeda, N. J., Pashler, H., Vul, E., Wixted, J. T., & Rohrer, D. (2006). Distributed practice in verbal recall tasks: A review and quantitative synthesis. Psychological Bulletin, 132(3), 354–380.
2 Donoghue, G. M., & Hattie, J. A. C. (2021). A meta-analysis of ten learning techniques. Frontiers in Education, 6, 581216. The 242 studies / 169,000 learners describe this review of ten study techniques overall; practice testing was among the most effective.
Also drawing on Dunlosky et al. (2013), Mawson & Kang (2025), and Latimier et al. (2021). This summary is informational and not a guarantee of any specific test outcome.
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