I am currently using Two Plus Two is Not Five with my 2nd grade son, and thank you for this resource. My son made adequate progress in math in kindergarten, but flat lined in 1st grade, initially making 2nd grade difficult, scary, and unsuccessful. Traditional drill and practice, even time delay, were not moving his fluency or automaticity with math facts along. I was really at a loss, and as a school psychologist by training, perplexed. Your “tricks” have been just the instructional component he has needed to break the habit of finger-counting and to commit these facts to memory for him. I appreciate the progression of skills and have found that he is working exactly where he needs to be. I am purchasing the multiplication book in preparation for next year to have for when we complete this book. Thank you. I can only imagine how many children you have helped through this resource, but you can add one young man in Lexington, KY to your list!