The purpose of this activity is to help students better understand percent cloud cover and to take more accurate cloud cover observations. Working in pairs or small groups, students use construction paper to simulate cloud cover. They estimate the percentage of cloud cover represented by torn pieces of paper on a contrasting background and assign a cloud cover classification to the simulations created by their classmates. Intended outcomes are that students will understand the difficulties of visually estimating the percentage of cloud cover and gain experience estimating cloud cover, evaluating the accuracy of estimates, and using fractions and percentages. Educational levels: Primary elementary, Intermediate elementary, Middle school, High school