I have a nice program that allows 4th and 5th grade students to practice their regrouping skill with 2 - 3 - or 4 column problems.
The program was created to meet the needs of a fourth grade teacher who wanted her students to be able to do subtraction problems with regrouping on her computer. She helped decided how the program should work. Numerous schools are now using this program. It is called "SubtrAction Action."
The teacher and student get accuracy statistics. This is a great way to make sure your students know how to subtract.
Email me at email@example.com for more information.