I created this worksheet last year while teaching 2nd grade. Students practice estimating and measuring objects. It could be used in a variety of ways:
Whole group: Students could follow along while you guide students over the doc cam how to pick an item, estimate, and measure. Once students get comfortable, the sheets can be put in the math/ science centers.
Small groups/centers: Perfect for science or math rotations. Students pick an item, estimate how many inches, then actually measure the object.