Rock Cycle [More important than you think! When picking rocks for hardscapes you want to use Metamorphic rock in most cases, especially with water (so it doesn't leach anything into the water) but it is also important to know what type of rockscape your c
"To teaching friends: I use this in high school as a formative assessment before moving on. I don't have a poster or anything, but it really helps you get a grasp on where the class stands on a tough concept." I might make a poster!!!