Gettysburg Area School District

Algebraic Expressions and Equations: Combining Polynomials Using Addition and Subtraction was unpublished by the OER Commons

Inventors in a Box An Historical Perspective was unpublished by the OER Commons

Astronomy Snakes & Ladders Game was unpublished by the OER Commons

The Homestead Acts was unpublished by the OER Commons

46f. A Consumer Economy was unpublished by the OER Commons

41. Western Folkways was unpublished by the OER Commons

Folds and Faults was unpublished by the OER Commons

What's the Big Idea? Astronomy was unpublished by the OER Commons

Oedipus the King: Personal Letter-Writing Assignment was unpublished by the OER Commons

Astronomy Hangman was unpublished by the OER Commons

Astronomy Crossword was unpublished by the OER Commons

Weathering Animation was unpublished by the OER Commons

Astronomy Video Playlist was unpublished by the OER Commons

The Day the Earth Shook was unpublished by the OER Commons

Physics: Projectile Motion (Part 1) was unpublished by the OER Commons

Weather Forecasting was unpublished by the OER Commons

Lisa Deaner added Seismic Activity

Lisa Deaner added Soil Investigations

Lisa Deaner added Identify The Rock

Lisa Deaner added A Flipped-Class Atmospheric Science Curriculum for Middle School Educators