You understood the whole video. Now write it down.

In the 2006 study, one group of students read a passage and then wrote down what they remembered. Another group read it twice. A week later, the first group remembered far more. The group that read twice felt more confident, but they were wrong. The 2008 study asked how far apart revisions should be. The answer was about 10 to 20 percent of the time left before the exam. With 90 days left, that means revising a topic every one to two weeks now, and every few days near the end.

The whole plan is built on the two methods at the top. The five at the bottom are the ones most students use. That is your chance. Spend the same hours, but on the methods at the top of this chart, not the bottom.

One correct answer from memory tells you that you know it today. Three correct answers on different days, each after you have forgotten a little, tell you that you will know it in February. The study found that going beyond three added very little. The gain came from the gaps between the days, not from repeating more times.

Textbook exercises give you twenty questions of the same type, one after another. After the third question, you stop choosing which method to use. You just repeat it. The exam does not tell you which chapter a question comes from. So choosing the method is the real skill. Practising one type at a time never trains it.

This is why a video can be the right choice on Monday and a waste of time on Friday. Watching a solution is the same as studying a solved example. It helps while the method is new. Once you can solve it yourself, watching it only costs you time.

Bloom's tutors did two things a classroom cannot. They checked each topic before moving on. And they gave feedback on the same day. An automatic marker and planner can do both, for every answer, at no extra cost. That is the job of this site. Every answer you give sends back one of four signals, and each signal has its own fix.

In written answers, every lost mark gets one of five tags.

Each week, the site counts your lost marks by tag. This shows what kind of mistake you are making now. The plan then works on that kind of mistake, not the whole chapter.

This is not a fault in you. It is how memory works. When something feels easy to follow, that feeling comes from having seen it before. Reading again and watching again build exactly that feeling. The only honest test of knowing something is writing the answer yourself.

What you practised in the evening is saved into long-term memory during the night. If you cut your sleep short, some of that day's work is simply not saved. Studying late into the night feels brave, but it gives worse results in tests.