Watching a video, reading an editorial, and following along with someone else's solution all feel like real progress. Learning scientists call this the fluency illusion, where your brain recognizes a familiar solution and mistakes that recognition for actual understanding. That recognition doesn't hold under pressure. StepThru is built around the research on what actually does.
These three findings from cognitive psychology are baked into the product.
When you write an explanation in your own words instead of reading someone else's, you encode it more deeply and more durably. Writing the editorial and building the visualization is the real studying.
Slamecka & Graf (1978)
Knowing why a monotonic stack works and being able to produce one under pressure are two completely different skills, and understanding one doesn't automatically give you the other. The gap closes through deliberate repetition.
Ericsson et al. (1993)
When students tested themselves instead of re-reading the same material, they retained significantly more a week later. The act of retrieval is what actually strengthens the memory trace.
Roediger & Karpicke (2006); Dunlosky et al. (2013)
Dunlosky et al. (2013) reviewed 10 study techniques across hundreds of studies. Retrieval practice and spaced repetition were the only two rated high utility.
The output of each stage becomes the input of the next.
StepThru gives you the structure and tools to do the learning yourself, then makes sure it holds.
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