How Addition and Subtraction Became a Fact Family    by Lisa Holder - O'Sullivan
Price: $2.00 USD. 560 words. Language: English. Published on September 20, 2009. Nonfiction » Children's Books » Reference.
(1.50 from 2 reviews)
Teachers and Parents this book is a fun way to teach Fact Families, a math concept taught in the primary grades, use the book along with some visual aides as suggested in the example lesson and your student(s) will be a pro at Fact Families in no time! I used this in my own 1st and 2nd grade classrooms and the kids loved it so much they ask to use the book and numbers during their free time.

The End of Two and Three Digit Addition and Subtraction!    by Lisa Holder - O'Sullivan
Price: $2.00 USD. 770 words. Language: English. Published on October 15, 2009. Nonfiction » Children's Books » Reference.
A story that gives kids a fun way to understand place value and its roll in adding and subtracting double digit numbers. Created by a Second grade gifted education teacher. This is one of the hardest concepts in primary math for students to master and yet one of the most important math skills students need. Arm your child or students with this story to help them in their understanding.