This activity could be done as a practice activity for first or second grade students learning/ practicing their groups of tens and ones. It will take 30 to 40 minutes to complete. The teacher will split the students into groups of 4 or 5. Each student in the group will have their own half sheet of the worksheet to record their estimates and actual measurements at each station. As the students rotate between stations they will measure different objects with different measurement tools (example: beans to measure a group members shoe from toe to heel or straws to measure the height of a group member lying down). The teacher will explain that before measuring the item, each student is to make their own estimate about how many groups of tens and how many ones it will take to measure the item. Each group member will not tell the other members of their group what their estimate is. The groups will then used the measurement tool to measure the object, write the actual tens and ones they needed to measure the object, and write the number word for each actual answer.