University of California
University of California Berkeley: Classifying Galaxies
Find out how galaxies are classified and then see if you can apply that knowledge to identify the different types of galaxies. In addition to explaining Hubble's galaxy classification system, the site has links to Hubble Space Telescope...
Space Telescope Science Institute
Amazing Space: Hubble Deep Field Academy
At this site, students can become a Steller Statistician, Cosmic Classifier, Galactic Guide or a Universal Graduate by attending the Hubble Deep Field Academy--and entering information in their Hubble Academy Log (HAL), which is assessed...