Thomas Bretl

Calc Visualizer helps the user better understand some of the most important concepts of calculus. Th

This app invites you to explore the relative motions of our solar system's planets and their moo

This math game is played against the superhero FactorMan! You earn points by choosing numbers betwee

Based on Donna Bretl's wood "Bretl Blocks" puzzles, GeoFit challenges you to fit small squares,

Reckonings 2 is a mathematics game that challenges players to hit nine target numbers by using addit

TranMan invites you to combine geometric objects to create complex patterns. Start with circles, pol

Using just three simple commands (forward, left, and right ), guide the mouse Algernon through a maz

Test your mental arithmetic and estimation skills by throwing "arithmeDarts" at target balloons that

A small yellow box follows a mystery path across a tabletop. By observing the box's motion in on

Arithmetic Quilts combines mathematics and art. Addition tables, multiplication tables, and tables b