Hi Ken, Glad to make your acquaintance. I'm a reading specialist and I work at the Charles Carroll Sch. in the Port Richmond section of Phila. It's challenging. As a long time reading teacher, I've been removed from math for as long. I haven't even been on the 'same page' with my very own children when it came to math. My question is; What the Sam Hill is elementary functions? Is it something that I knew by another name?