Curated OER
Pea Brain! Explorations in Estimation
Students estimate how many peas fit in a container. In this science instructional activity, students calculate the weight of a pea and record it. They use this data to calculate how many peas fit in a human brain.
Khan Academy
Khan Academy: Estimating Time (Seconds, Minutes, and Hours)
Practice estimating the length of an event using seconds, minutes, and hours. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
NumberNut
Number Nut: Breaking Up a Day Into Hours
A concise lesson that examines the concepts of time and measurement by breaking a day up into hours. The lesson lists common time referents and important time related facts to remember. Students can practice time telling skills with the...