Groundhog Day 3-Digit Addition is an engaging, standards-aligned digital math activity designed to strengthen students’ understanding of three-digit addition. The activity includes 30 total addition problems, with 12 problems without regrouping and 13 problems with regrouping. Students build number sense by typing the missing numbers in each equation and then clicking the groundhog that shows the correct sum, promoting both accuracy and visual verification. To extend conceptual understanding, th