Curated OER
The Grandchildren Problem
For this grandchildren problem, learners read facts about grandchildren. They use logical reasoning to determine the birthday of four grandchildren. Students predict the date of the fifth grandchild's birth. This one-page worksheet...
Curated OER
The Achievements and Challenges of Guatemala
Students research the Mayan number and calendar system. They translate a variety of math problems from base-10 Arabic numbers into a base-20 Mayan representation. They discuss current challenges faced by the people in today's Guatemala.