Here is a 20 slide PowerPoint that discusses glaciers. It teaches what a glacier is, how glaciers are formed, where they are located, and two different categories of glaciers. The grooves and striations left from glaciers are also discussed and illustrated. There are a couple of video suggestions to supplement the lesson.
You may also purchase separately a student note taking guide that complements the PowerPoint. Students fill in the blanks while viewing with the note taking guide.