Lesson 1: Earth's Interior
BBC Bitesize: Convection Currents
National Geographic: Mantle
Lesson 2: Minerals
Lumen Learning: Mineral Formation
How Stuff Works: Mexico's Giant Crystal Cave Is Beautiful But Deadly
Lesson 3: Rocks
Lesson 4: Cycling of Rocks
Mineralogy4kids: The Rock Cycle (Rock Cycle + 3 types of rock)