Tweet Last year, I had a second grader who came in having no concept of subtraction. In my beginning of the year assessment, he could not answer questions such as 7-6 = or 10-5. After a great deal of work on conceptual development and hands on practice, he was doing a great job with his subtraction facts. Except for some of the most challenging "facts" that our program teaches as the up to 10 facts. (basically a teen number take away a 6, 7, 8 or 9. Despite repeated attempts to "teach" this…
