The American Educational 2356 hardness collection with test kit is used for geological study, and has nine mineral specimens for testing on the traditional hardness scale. The collection is number coded and includes a key sheet for identification. The 2356 has a compartmented tray for display and storage, with specimens that measure 1 x 1-1/2 inches (L x W). (L is the horizontal distance from left to right; W is the horizontal distance from front to back.) Specimens in this collection may vary, based on availability at the time the product is packaged. The collection’s test kit includes a streak plate, glass plates, and nail for hands-on learning. The 2356 is suitable for grades 6 to 12 and ages 11 to 18.Science education products incorporate applied math and science principles into classroom and homeschool-based projects. Teachers in pre-K, elementary, and secondary classrooms use science education kits and products alongside science, technology, engineering, and math (STEM) curriculum to demonstrate STEM concepts and real-world applications through hands-on activities. Science education projects include a broad range of activities, such as practical experiments in engineering, aeronautics, robotics, energy, chemistry, physics, biology, and geology.American Educational Products, LLC, manufactures and supplies classroom materials and teaching tools for science and math education, as well as early childhood and active play products. The company, founded in 1986, is based in Fort Collins, CO. What’s in the Box?American Educational 2356 9-Piece Hardness Collection with Test Kit Key sheetStreak plateGlass platesNail