Staircases: a lesson which can work in different ways at many grade levels.

- Lessons from
*Algebra: Themes, Tools, Concepts*by Anita Wah and Henri Picciotto - Arithmetic Sequences and Series | Teacher notes
- Geometric Sequences and Series | Teacher notes

- From my Math Education Blog:
- Geometric in More Than One Way!

- An unusual but effective Algebra 2 introduction to sequences:
- Iterating Linear Functions

- Lessons for 11th and 12th grade about triangular, pentagonal, and Fibonacci numbers:
- Stairway to Infinity! Proof by Mathematical Induction

- Directory of material on this site that involves integer sequences, with links to the OEIS:
- Integer Sequences