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# Deep thinking

Mathematical ideas are rarely taught in one lesson. Some teachers and researchers say that a student needs to meet an idea 100 times for it to be understood well.

Of course, this does not mean 100 repetitive exercises. In fact, it means quite the opposite: that students need to meet the one idea in **many** different ways and contexts.

It takes time to engage with an idea deeply. Students need to:

- connect a new idea with what they already know
- think and talk about it
- be challenged to apply and extend it
- recall it for use in various contexts.