Integrate Earth Day activities and math skills practice with this Earth Day Math Centers packet created for first grade. Use it during the month of April. The 8 centers include time to the hour and half hour, place value, number order, operation sort, comparing numbers, number bonds, adding and subtracting tens, and measurement. Use the centers for guided math practice, for spring math stations, or for whole class math instruction. Each of the centers has a description card and recording sheet(s