https://www.youtube.com/channel/UCTNQj0k-kc1Ja8UiXFVikZA This link is to The Code Math Channel with instructional videos including one for this book. This book focuses on the memorization of the addition/subtraction tables. This skill is one of the most important tasks for elementary students without which math becomes increasingly harder. Relying on counting as a strategy is tiring and time-consuming. These materials incorporate manipulatives, worksheets, and games making memorizing fun and ea