What are Terrific Triangles?

Terrific Triangles is a free software program written by Scott Morrow that uses technology to build on the benefits of fact triangles.

 Click here to download Terrific Triangles.

The benefit of Fact Triangles is that they cluster facts into fact families.  Reducing the number of facts you need to master.

Facts may be mastered through the use of triangle fact cards. A triangle fact is pictured to the right. Fact triangles are a more effective device for memorizing the facts than ordinary flashcards because of their emphasis on fact families. The three numbers involved in an addition fact are placed on the corners of a fact triangle. The sum (answer) is at the top, under the asterisk (*). You cover one of the corners of the triangle. Then your child gives an addition/subtraction fact that has the number you are concealing as its answer. For example, in the fact triangle pictured, your child would say either “3 + 4 = 7” or “7 – 3 = 4.”This same approach is also used for the multiplication and division facts, since multiplication and division have fact families, too. 

This free software program also allows you to focus on certain fact families or work with a timer.  The directions for how to use this program are shown at the download site linked above.