The central problem of knot theory is distinguishing between various knots and classifying them.

The best way to learn about knots is to make some knots and play with them.

- classifying knots
- knots as closed circular braids
- crossings
- keeping track of crossings
- crossing number
- the trefoil knot
- the zero knot
- mirror images of knots
- braids
- components of braids
- finishing braids
- links
- seifert surfaces

- Knot Coloring Puzzles
- A Table of Knots to Study and Make
- Untangling the Mathematics of Knots
- Knots, Links and Other Mathematical Tangles
- Knot Theory and the NCTM Standards