Resources
Online website dedicated to all things battery
This website is free, updated often, and contains all the information you want to know about batteries.
This site shows 3D models of anode and cathode materials
This website has a ton of resources for battery activities in the classroom including a playing card game.
This PHET can be used to simulate series and parallel battery combinations.
Create, save, and share circuits
Great course that includes a crash course lesson on how batteries work.