You and your students will love these digital, self-checking activities that cover adding and subtracting fractions with unlike denominators, simplifying fractions, multiplying as scaling, multiplying decimals, double-digit multiplication and adding and subtracting large numbers. Each mystery puzzle is no prep and computer-based using Google Sheets. We know as teachers that students need continual, spiral practice in order to solidify their math skills. That is why I created these December Digit