People’s reactions have been pretty entertaining. @andrewpfister I don’t think they cover the time travelers paradox until Algebra II — Corey Garnett (@CoreyGarnett) May 20, 2016 Advertisement ...

PCI Ed's Algebra City Covers 28 Common Gaps in Student Understanding By Dian Schaffhauser 06/26/12 PCI Education, a company that develops curriculum products, has published a set of learning materials ...