Methods of interaction
======================

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Problem
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What are the different ways a student can interact with a computer tutor?

* Typing
* Interactive diagrams
* Buttons
* Selection
* Reveal hint

Solution
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Linear input for mathematical expressions.

No free-form multi-line input.

Matrix entry input widget.

JSXGraph/GeoGebra/Eukleides interactive diagrams.

Not done much with buttons/selection.

"Show steps"