Algebra puzzles. Reorder the steps to solve from the original equation(s) to the solution. Choose from a variety of topics: fractions (add, multiply, simplify), lines (slope-point, slope-intercept, 2 points, and general equation), circles, linear equations, system of linear equations, linear inequations, factoring (integers, difference of squares, series of terms), quadratic equations. Each topic includes a very large number of puzzle examples. Move the rectangles around with your finger to reorder the steps going from the equation(s) to the solution. Colors turn white and green when you have arrived at the solution. If you get the puzzle correct, you get a check mark. For any given topic, you get a different puzzle each time.