Not a worksheet, but I like how she demonstrates multiplication. She shows on one board a couple different ways to look at the same thing at. She has a 300 free sample worksheet zipped download packet if you sign up for her email virtual tour of her cirriculum. She sells PDF books of worksheets she made for a living. Math mammoth.com. Aurora Lipper, the science lady, recommended her in a recent e-mail.

Youth lives by personality, age lives by calculation. -- Aristotle on a calendar