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I created a group to do an assessment. I have created the task, about gradient. Students are supposed to move the points to match the requested gradient. The gradient is auto-generated by random numbers. When students turned in their work on GeoGebra group, the screen that I viewed as a teacher is different. How to solve this problem? The gradient asked was 2, students got it correct and submitted, but the gradient on my view is -3 (updated). How to prevent this case to happen? Thank you.
Files:
grup geo.PNG
The same question 
I think that only asking a screenshot of the correct solution and feedback can help, since at reopening every random numbers in the construction are automatically recalculated.
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