Texas Instruments
Texas Instruments: Dynamic Algebra
This Computer Algebra System (CAS) activity shows how the method of dynamization by parameterization works with almost all classical math problems, which produces problems for CAS calculators quickly.
Khan Academy
Khan Academy: Solve for T
In this seven-problem quiz/practice students parameterize rays by solving for t.
Wolfram Research
Wolfram Math World: Smooth Surface
This site gives the terms which must be met in order for a surface to be a smooth surface. There are related links on this page.
Khan Academy
Khan Academy: Ray Intersection With Line
In this seven-question quiz/practice students find where a ray intersects with a line in implicit form.
Khan Academy
Khan Academy: Parametric Ray Intuition
This is a seven-question quiz/practice review the parametric representation of a ray.