**Content Videos (Lectures and animations to supplement lessons):**

- Identifying Angles Between Lines and Planes
- Using Normal Vectors to Differentiate Between Parallel and Perpendicular Planes
- Using Vectors to Find Angles Between Two Lines in 3-D Space
- Demonstration Comparing the Formulas for the Volume of Cylinders and Cones
- Cylinder, Cone, and Sphere Volume
- Cones and Spheres: How Many Cones Does It Take To Fill a Sphere?
- 3 Equations, 3 Unknowns
- Solving Systems of Equations in Three Variables
- Three Variable Systems with Infinite or Null Solution Sets
- Types of Linear Systems in Three Variables

**Interactives (Online activities for student interaction & practice with content):**