Protractors are confusing! Teaching children to use them is often harder than teaching them to tell the time! Here's a wonderful idea that helps... simple, learner-protractors. Print these onto acetate and watch your children use them with ease.
Another site/link rec. from Dr. Nickie "Angles is a 4th Grade Standard in the CCSS. Here is a great set of activities to have students do in their math journals. I (Dr. Nickie) really like it because it is interactive, engaging and standards-based. Check it out!Types of Angles math journal @ Runde's Room."