Simple Animals:

1. Animal Classification
   1. Traits of Animals
   2. How Animals Are Classified
2. Sponges and Stinging-celled Animals
   1. Sponges
   2. Stinging-celled Animals
3. Worms
   1. Flatworms
   2. Roundworms
   3. Segmented Worms
4. Soft-bodied Animals
   1. Traits of Soft-bodied Animals
   2. Classes of Soft-bodied Animals

Viruses and Monerans:

1. Viruses
   1. Traits of Viruses
   2. Viruses and Disease
   3. Controlling Viruses
2. Monera Kingdom
   1. Traits of Bacteria
   2. Bacteria and Disease
   3. Helpful Bacteria
   4. Controlling Bacteria
   5. Blue-green Bacteria

Complex Animals:

1. Complex Invertebrates
   1. Jointed-leg Animals
   2. Spiny-skin Animals
2. Vertebrates
   1. Chordates
   2. Characteristics of Fish
   3. Jawless Fish
   4. Cartilage Fish
   5. Bony Fish
   6. Amphibians
   7. Reptiles
   8. Birds
   9. Mammals