Last year, I took a continuing ed course and this book was a part of the curriculum. I am a homeschool mom who was formerly a classroom teacher. But, I taught middle school not early elementary. At first, because I didn't have a lot of experience with this age, I didn't know how effective the activities in this book would be. But, after using it for a year, I would enthusiastically recommend it to both classroom teachers and homeschool teachers! It is a wonderful approach to helping young students really grasp and understand math--not just learn wrote mathematics. One of the things I love most about this book is how she clearly identifies what children need to learn, conceptually, in order to truly learn how to count, understand patterns, and grasp more/less. What's also wonderful is how little prep the activities in the book take! They are so easy to prep for! As a homeschool mom of a 4 year old and 2 year old with one on the way, my time is already stretched. But, this book allows me to do interactive lessons with my daughters (and modify them for my 2 year old) with very little prep involved.