Curated OER
Measuring Pots of Gold
Have your class practice measuring and weighing "leprechaun's gold" for St. Patrick's Day. In this measurement instructional activity, students work cooperatively to use scales to measure and weigh pretend gold. They use cups,...
Scholastic
Scholastic Teachers: Celebrate the 100th Day of School!
Scholastic has put together 100th day math ideas from several different teachers. Includes "zero, my hero", probability, sorting, measuring, estimating, counting, weighing, money, and other ideas for celebrating the 100th day.
Other
Teachers first.com: 50 Ideas for the 100th Day of School
Great ideas for "100th Day" activities. Most of these would be a good challenge for upper elementary school students if you want to include them in your 100th Day celebration. Activities include counting, measuring, weighing, sorting,...