One website, HelpingWithMath.com, posts information about my book, Two Plus Two Is Not Five, and there are bunch of sample pages that can be tried with students if someone is not sure about whether or not to purchase the book.

Several different tricks and strategies from the beginning of Two Plus Two Is Not Five are available. I agreed to allow these pages to be posted because these practice pages do help children learn math facts.

The workbook problems in my books are not random; the problems are structured to give children good practice and review with math facts as they learn them, and to review what they already know.

Link to HelpingWithMath.com:
http://www.helpingwithmath.com/resources/math_facts.htm