This place has it all: more explanations, videos, and worked problems. Just scroll down to sequences and series and watch until your heart is content.

Videos, videos, videos! Some of our favorites for this chapter. Get your popcorn ready.

This is a pretty basic arithmetic sequence explanation in video form. It's a great supplement to our Shmooptastic explanations.

Here you can find interactive quizzes to really make sure you get it. Scroll down to Number Sequences or try your hand on a different topic.

We taught you the basics, now go get your application on. Here you can see how geometric series can be used for all kinds of stuff, from finance to Greek philosophy.

Paul's Notes is an online math gem. His explanations are a little involved (and you need to understand the definition of a limit). But if you're dying to know more about sequences, Paul is your man.

The Math Dude: simple yet cool. After the brief text explanations, don't forget about the video links near the end.

This page tells us how to use geometric series to figure out our mortgage payments. Who knew?!?