The concept behind the Rock Detective Kits is simple: students learn best what they discover for themselves. The instructor provides rocks, fossils, and minerals along with mystery questions pertaining to each sample. Students move about freely, first solving the mysteries then gathering to share discoveries. Activities in these kits exceed the National Science Education Standards for Content. The Bucket Kit contains everything needed for a class of 30 students. It consists of 25 mysteries and contains 40 to 50 samples of rocks, minerals, and fossils. This kit also comes with a teacher notebook and helpful techniques for teaching dozens of earth science concepts. The kit also includes accessories such as magnifying glasses, magnets, streak plates, and a handy storage bucket. The Rolling Cart Kit contains enough material for up to 50 students. It consists of 75 mysteries and more than 100 rocks, minerals, and fossil specimens.