Free interactive geometry, algebra, graphing and statistics software. Students construct figures and drag them to test what stays true.
Interactive Amplify
Students test the angle in a semicircle theorem by dragging a GeoGebra construction, write a proof, and post it to a Padlet column for their method so the class can compare approaches.
Students decide whether pairs of 3D lines intersect, are parallel or are skew, check in GeoGebra 3D, and the teacher uses the live Classroom view to pick errors to discuss.
Students differentiate the same function by the route of their choice, check it in GeoGebra, and post their working so the teacher can compare routes.
Passive Amplify
The teacher drags a GeoGebra slider that re-cuts a shaded bar into more and more equal parts while the shaded amount stays fixed, and Grade 3 watch 3/4 become 6/8, 9/12 and 12/16.
Grade 4 watch the teacher drag a GeoGebra rectangle whose perimeter stays at 20 cm, predicting on mini whiteboards what happens to its area as it changes from 1 cm by 9 cm to a 5 cm square.
This page is one of a growing set of PICRAT examples by cell, subject and grade. Page maintained by Andy Perryer.