Virtual Manipulative

The manipulative I experimented with this week was called Diffy. It was under Numbers and Operations for grades 6-8. The object of the manipulative is to complete a puzzle by finding the difference of given numbers. After a couple of rounds I Thought of the puzzle as somewhat boring and simple. Then I noticed you could choose what you wanted to subtract. The choices were whole numbers, decimals, money, fractions and integers. This allowed the puzzle to be more challenging and would allow students to work at their level. This manipulative also allows for students or teachers to make their own problems. If the number entered was wrong it disappeared and allowed for another number to be entered. If the answer provided was correct the number changed to the appropriate color of the puzzle. After completing the puzzle the screen began flashing and changing colors.