A Few Useful Links:
Paul’s Online Math Notes, Calculus III
3D Function Grapher (also does Parametric Surfaces!)
GeoGebra Resources:
Graphing with GeoGebra: Intro to GeoGebra
Surfaces: Have a look at the equations and graphs of common surfaces
https://www.geogebra.org/3d/s52k8uur: Visualizing Traces and Partial Derivatives
Tangent Plane Demo: Visualize Tangent Planes and see their Connection to Partial Derivatives
Triple Integrals: See how to build up the domain of a triple integral and visualize if it is Type X, Y or Z.
Coordinate Systems: See how Cartesian, cylindrical and spherical coordinates work
https://www.geogebra.org/3d/unfhkaps:Line Integrals of Vector and Scalar Fields
https://www.geogebra.org/m/jb7z9wnb:Fundamental Theorem of Line Integrals
Collection of Demos: Student Selected Collection of Various Demos
Learning Activities, By Section:
| Section | Topic | Learning Activities | 
| 12.1 | Three-Dimensional Coordinate Systems | Visualizing the Octants | 
| 12.6 | Cylinders and Quadric Surfaces | Quadric Surfaces Notes on Sketching and Identifying Surfaces Surfaces: Have a look at the equations and graphs of common surfaces in GeoGebra | 
| 12.2 | Vectors | Visualizing Vectors in 3D | 
| 12.3 | The Dot Product | Dot Products in 3D Direction Angles (*useful application) Projections (*useful application) | 
| 12.4 | The Cross Product | Cross Products Volume of a Parallelepiped (*useful application) | 
| 12.5 | Equations of Lines & Planes | Line in 3D (static) vs Line in 3D (variable) | 
| 14.1 | Functions of Several Variables | A Gallery of Examples | 
| 14.2 | Limits and Continuity (*interesting topic, neither covered in class nor on exams) | Limits Handout | 
| 14.3 | Partial Derivatives | Cross Sections https://www.geogebra.org/3d/s52k8uur: Visualizing Traces and Partial Derivatives in GeoGebra | 
| 14.4 | Tangent Planes and Linear Approximation | Linear Approximation Tangent Plane Demo: Visualize Tangent Planes and see their Connection to Partial Derivatives in GeoGebra | 
| 14.5 | The Chain Rule | Chain Rule Practice Exercises (with Solutions) | 
| 14.6 | Directional Derivatives and the Gradient Vector | Directional Derivatives Video | 
| 14.7 | Maximum and Minimum Values | Max and Min Video | 
| 14.8 | Lagrange Multipliers | Absolute Max/Min Video | 
| 15.1 | Double Integrals over Rectangles | Double Integrals over Rectangles Video | 
| 15.2 | Double Integrals over General Regions | Double Integrals over General Regions Video | 
| 15.3 | Double Integrals in Polar Coordinates | |
| 15.6 | Triple Integrals | Modeling Solids Handout (Play-Doh!) Surface Area Video (*helpful for Chapter 16) Triple Integrals/Double Integrals in Polar Video Triple Integrals: See how to build up the domain of a triple integral and visualize if it is Type X, Y or Z in GeoGebra | 
| 15.9 | Change of Variables in Multiple Integrals | Change of Variables Video | 
| 15.7 | Triple Integrals in Cylindrical Coordinates | Visualizing Cylindrical Coordinates | 
| 15.8 | Triple Integrals in Spherical Coordinates | Visualizing Spherical Coordinates Basic Shapes in Spherical Coordinates Spherical Coordinates on GeoGebra (use slider bars at top left to change variables) Summary of Triple Integrals (All Coordinate Systems) Coordinate Systems: See how Cartesian, cylindrical and spherical coordinates work using GeoGebra | 
| 13.1 | Vector Functions | A Space Curve | 
| 13.2 | Derivatives and Integrals of Vector Functions | |
| 13.3 | Arc Length | Linear Approximation of Arc Length | 
| 16.2 | Line Integrals (Scalar Functions) | |
| 16.1 | Vector Fields | Simple 2D Vector Field | 
| 16.2 | Line Integrals (Vector Fields) | https://www.geogebra.org/3d/unfhkaps:Line Integrals of Vector and Scalar Fields in GeoGebra | 
| 16.3 | The Fundamental Theorem for Line Integrals | Fundamental Theorem for Line Integrals Video https://www.geogebra.org/m/jb7z9wnb:Fundamental Theorem of Line Integrals in GeoGebra | 
| 16.4 | Green’s Theorem | Green’s Theorem Video Summary of Line Integrals (methods and deciding what to use) | 
| 16.5 | Curl and Divergence | The Idea Behind Curl | 
| 16.6 | Parametric Surfaces and Their Areas | A Gallery of Examples | 
| 16.7 | Surface Integrals (Scalar Functions) | Practice Problems with Visualizations | 
| 16.7 | Surface Integrals (Vector Fields) | |
| 16.9 | Divergence Theorem | |
| 16.8 | Stokes’ Theorem | Summary of Surface Integrals (decision-making and methods) |