Busy bag idea - Improper fractions and mixed numbers 'Go Fish' card game. Students make their own cards and challenge each others' ability to translate improper fractions to mixed numbers and vise versa. Modify for fraction, decimals, and percents.
For early finishers? Math Workshop Adventures Create a new number each day. When kids finish their math assignments, they work on the number of the day problem. Introduce new concepts as the year progresses (multiplication.