My first graders were so excited to do this activity! The worksheet itself is self explanatory. Students will get different units of measurement (paper clip, penny etc) and measure different objects. But before that, they should estimate. The units of measurement I chose and the objects are very accessible but feel free to modify! Rules for measurement and at least a mini lesson on measurement should be done before using this worksheet. It is a greet informal (and fun) assessment to do on measuring as well.