Amy S. Hansen

Emergent readers learn about solids and liquids in Solid or Liquid? by Amy S. Hansen.

Emergent Readers Learn To Recognize Different Materials Such As Wood, Metal, And Plastic....

Early Readers Investigate Which Materials, Shapes, And Sizes Float Or Sink.

Early readers investigate what matter is in Matter Comes in All Shapes by Amy S. Hansen.

Intermediate Readers Explore Concepts Of Evaporation, Condensation, And Water As A Solid,...

African's seek to find ways to purify their water.

How surgery is performed to put in an artificial retina in the eye

By studying bats and their special use of sound scientists solved the mystery of how bats...