- Select Settings (the gear icon) and untick/deselect Show Grid, Show xAxis/yAxis, Show Numbers (on both the xAxis and yAxis).
- Create two random variables a and b, each taking values [-10, 10], you can choose your desired range.
- Add via Text (select Text ABC) objects a+b = ? (do this by hovering the cursor on the menu with a = 2, and select Text ABC -> Serif/LaTeX formula -> GeoGebra logo -> choose objects as appropriate by clicking them).
- Add via Text (Select Text ABC, under the menu a = 2) the texts "Correct", and "Incorrect", one at a time.
- Input a+b, this will likely assign the variable a + b to c (i.e., c = a + b).
- Create the variable, answer = 0 (You can select a different value from 0).
- Set the initial input by adding Answer = 0 via Input Box (Start from the menu a = 2, select object, answer = 0), and then add Caption, Answer = .
- Link the object answer = c to the text Correct (Select Correct – > Settings – > Advanced, then input answer == c under "Condition to Show Object").
- Link the object answer \(\ne\) c to the text "Incorrect" (Select "Incorrect"– > Settings – > Advanced, then input answer \(\ne\) c).
- Add "New Problem" button under the menu a = 2: Select Button, add Caption "New Problem", and put "UpdateConstruction()" under GeoGebra Script, then click Ok.
- Click "New Problem" to generate new question, put your answer into Input Box, click anywhere out of the box to check your answer.
- You can always add various decorations to texts/objects, such as colors.
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Developing Interactive GeoGebra Applets
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Here we use GeoGebra to develop a simple interactive applet to help kids learn integer addition. Below are algorithmic steps for creating the intended applet:
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