Rocks are all around us, but students may never have examined them up close before. Now that they understand the three types of rocks and how they are formed through the rock cycle, encourage them to spread out on the playground and find as many different types of rocks as they can. Then let them label the rocks, to the best of their abilities, in small groups. Ask them to discuss how many of each type of rock they think they found, as well as how they were able to identify each one.
It is important for students to realize that the rock cycle is just that--a cycle. Rocks do not go through the cycle only once, and in fact, they do not always go in one direction through the cycle. Have them write a story about a rock who goes through the rock cycle more than once, taking a different path each time. For example, the rock might begin inside of a volcano and come out as an igneous rock, then combine with other materials to become a sedimentary rock, then encounter heat and pressure to become metamorphic, and then recombine with entirely different materials to become sedimentary again. Encourage students to be creative with their stories, including the feelings and thought of the rock character in their writing.
You can also use cooking to explain how the three types of rocks form. For example, you can make chocolate chip cookies with students and show them how when they mix the batter they using a similar process to the creation of sedimentary rocks, with the chips becoming a part of the cookie but not changing at all. When they bake the cookies, the heat of the oven melts the chocolate chips slightly, so that the rocks become metamorphic rocks. Making fudge, on the other hand, which heats up the mixture so much that everything combines together, would be analogous to creating igneous rocks.