I have one child that is working on the doubles multiplication facts (aka perfect squares---5x5, 9x9, etc.) and I had a hard time finding premade worksheets or generators that exactly addressed this type of fact (or maybe I just didn't used the right terminology to search).
At any rate, I eventually found one site that had four such worksheets and I thought I would share in case others had trouble finding some as well.
You can download them from Dad's worksheets.com which is a pretty useful site for other kinds of premade math worksheets as well.
