Astronomy - Universe - Galaxies - Types of Galaxies

Photographing other galaxies - Horizon - The Six Billion Dollar Experiment - BBC
04 The Universe - Galaxies

The Kingfisher Space Encyclopedia
Galaxies by Howard K. Trammel

Discussion:
Size and estimated number of galaxies
Galaxy shapes
Movement of Galaxies

Activity:
Draw the three main types of galaxies

Astronomy - Universe - Galaxies - Milky Way Galaxy

Guide to our Galaxy

The Kingfisher Space Encyclopedia
Galaxies by Howard K. Trammel

Discussion:
Placing our solar system within the Milky Way
Age of the Milky Way; solar system's orbit within the galaxy
How we perceive the Milky Way from Earth
The Local Group

Activity: 

Attempt to see the Milky Way (probably not possible from our location)

Draw the Milky Way from two perspectives