Draw polygons on dot paper, count points, and discover a formula for area using only dots.
Collect data on polygons drawn on a grid, find the formula connecting area to interior and boundary points, and test it.
Explore arithmetic that wraps around like a clock and use it to solve remainder and last digit puzzles.
50 to 80 min · 3 materialsView projectEncrypt with a keyword and break the cipher by splitting the message and using frequency analysis on each part.
1 to 1.7 hr · 4 materialsView projectDecide whether a route can cross every bridge once and discover the rule that solves every such puzzle.
50 to 80 min · 4 materialsView projectDiscover why you can test for divisibility by 3 and 9 by adding digits, and prove it.
45 to 75 min · 3 materialsView projectDiscover systematic ways to count arrangements and selections, and use them to solve olympiad-style problems.
50 to 80 min · 3 materialsView projectScatter random points in a square, count how many land inside a quarter circle, and use the ratio to estimate pi.
50 to 90 min · 5 materialsView projectEduVistaHQ.com · Learn • Explore • Grow