This bingo set is the perfect review game for your class to play during a rocks unit! This set includes 25 unique bingo cards - perfect for classrooms, nature camps, or homeschool co-ops! I included two calling card options for two ways to play! Play regular bingo with the regular calling cards, or, review rock ID by reading the hint cards.This set features the following rocks: gneiss, schist, phyllite, slate, marble, hornfels, quartzite, conglomerate, sandstone, siltstone, mudstone, limestone,