In unit 3, students will learn to use a protractor to measure angles. Here is a link to an on-line protractor so students can practice at home. In class, we ask the kids to estimate the size of their angle prior to measuring so they will know if their answer makes sense. At first, they may only be able to say that an angle is greater than or less than 90 degrees. As they gain experience measuring various size angles, their ability to estimate should improve.
on-line protractor
