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Teach21 Science Expository Writing

First Grade
  The House of Horticulture
  Water Magic…or Is It?
 
Second Grade
  Comparison of Living Things
 
Third Grade
  Comparing Plants to See How They Grow
  Going, Going, Gone?
 
Fourth Grade
  Circuits: How Electricity Flows
  Paper Airplanes to Go!
  That’s So Dense!
  Violin, Viola or Cello, What’s the Difference?