FREE for a limited time – Math Animations (Grades 1-8). This app Includes numbers, decimals, fractions, addition, subtraction, multiplication, division, geometry (perimeter and area of parallelograms, triangles, trapezoids), measurement, algebra for elementary and middle school students. The title says it all! The purpose of this app is to show kids how math works – visually. The app features 55 animations that explain everything from counting to beginning algebra. There are no words used. Math concepts are visually explained in step-by-step illustrations. If you have kids that need to “see” how things work, you may want to add this app to your list of teaching resources!