Deep Blue Sea

Ocean Animal Encyclopedia

Marine Gardens

Marine Biomes (There is a quiz you can take after reading the information.)

Wild Kratts: Ocean Explorers 

Exploring the Coral Reef

Starry, Starry Night

Constellations

Star Constellations

Space Place: Constellations

Planet Facts for Kids

Celestial Bodies

Geometrics 

Metric Unit of Measurement

Measure and Classify Angle

Converting Units (Provides great examples of converting and comparing measurements.)