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- My GeoGebra profile – Find all my previously published GeoGebra materials here including original notebooks for the Eigenmann geometry problems
- Where is Marcus? (Desmos) – Use a linear equation in two variables, and a system of two linear equations, to describe the location in space of a lost friend
- Gas Station Ripoff – Adapted from a 3-Act task by Dan Meyer. Proportional Relationships. Uses the aggregation function to display bi-variate data entered by students.
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