• Explore and recognize the different attributes of rocks.
• Compare and measure the mass of rocks.
• Identify rocks which can be used as writing tools.
• Research how rocks are a valuable natural resource in society.

Activity

• As an introduction to this activity read the wonderful story of Sylvester and the Magic Pebble written by William Steig (This is a story about a donkey who finds a magic pebble and turns himself into a rock. He remains this way throughout the seasons until one day).

• Take the students outside for a rock hunt around the schoolyard, to the beach, through a forest, etc. If this is not possible, invite children to bring in some rocks. Engage the children in rock sorting activities: smooth/rough rocks, big/small rocks, soft/hard rocks, different shape rocks, etc.

• Bring in some nails. Have the children scratch various rocks with the nail to determine if rock is hard or soft. Explore which rocks make great writing tools. Set children up in groups of 3 and have them choose 6 rocks to weigh. First have the students predict the weight of the rocks and order them from heaviest to lightest. Later the weights can be checked using a weight scale.

• As a culminating activity have children use tempera paint and scoops of material to create a pet rock. Discuss this use of rocks and have children name other ways rocks are used (artists, walls).

Assessment Tips from Old Tom the Turtle

• Complete a class web of information learned as a result of the rock hunt and study. Brainstorm with whole group. Post the web in the classroom and invite students to add to it throughout rock study.

• As part of a homework project, have students research the ways rocks are used by society. Have them share this information with the class. Note students' interest and degree of involvement with this project.