The document provides a list of math website and app resources for grades 3-6, including interactive games on sites like Sheppard Software and Khan Academy to reinforce math skills, as well as question and answer archives on Ask Dr. Math and video lessons on NeoK12. It also recommends apps like Math Vs Zombies and Everyday Mathematics that make math practice entertaining through arcade-style games and topics at multiple grade levels. The resource list is introduced by the author Meredith Martin who is a K-6 computer teacher and technology presenter.