Interleaving and mixed review
Practising one type of problem at a time feels smooth but hides a key skill: choosing the right approach. Mixing problem types trains you to recognise which method a situation needs.
Key ideas
- Blocked practice builds fluency; interleaved practice builds discrimination.
- Mixed practice feels harder and produces better results on real tests.
- Real performance never announces which chapter a problem is from.
Step by step
- 1
Learn each method on its own first.
- 2
Build a practice set that mixes three or more types.
- 3
Before solving, name which method applies and why.
- 4
Review errors by type to see which distinctions you confuse.
Example
A trainee practises statistics questions shuffled across tests rather than one chapter at a time. Her exam score rises because she learns to spot which test fits each scenario.
Your drill
Take three problem types you have learned. Shuffle twelve problems and, for each, write the method before solving.
Common mistakes
- Interleaving before you understand each method at all.
- Abandoning mixed practice because it feels harder.
Check yourself
What skill does interleaving train that blocked practice does not?
Show the answer
Recognising which method or concept a new problem requires.
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