HyperPhysics - Conductors and Insulators
HyperPhysics - Resistance
HyperPhysics - Insulators
HyperPhysics - Resistivity and Conductivity
Physics LibreTexts - Resistivity and Resistance
HyperPhysics - Resistance
HyperPhysics - Insulators
HyperPhysics - Resistivity and Conductivity
Physics LibreTexts - Resistivity and Resistance
This is a deep dive. It's good to know the shape of this material, but don't get bogged down.
Topic Resources
20 questions
concept review with practice items
figures for classroom presentation