Going digital? This is the perfect Digital INB for teaching Multiplication of Whole Numbers. This digital INB covers arrays, area model, and standard algorithm, 2 digit by 1 digit, 2 digit by 2 digit multiplication as well as rounding numbers to the nearest 10, 100, and 1000. This Digital INB was designed for 4th grade but can be used as enhanced curriculum for 3rd or review for 5th.