Geometry

Games
Feeling Lucky! Review Games (Cathy Roitz)
Probability Dice Game (Shelli Temple)
Life on the Number Line (Elizabeth Statmore)
Favorite Review Games (Tina C)
Review Games by Students for Students (Remi Smith)
Splat! (Cindy Wallace)
Round the Room Activity (Natalie Turbiville)
Racko (Angie Eakland)
SMART Board Game Board Template (Pinterest)
Ghosts in the Graveyard (Mrs. H)
Survival of the Fittest (Nora Oswald)
Making Matching GRID Games (via @heatherfindell)
INB Graphs (Meg Craig)
 

Valuables
Foldable Templates (Carol Leonard)
Dweck Growth Mindset (Allison Krasnow)
Calculator Cheat Sheet (Mrs. H)
Wall of Remediation: A How-To Guide (Daniel Schneider)
NYC DoE Common Core Tasks
Shmoop's Natural Resources for Teachers
Seven Activities to Make Students Talk Math (Geoff)
Folding Stories (Bowman Dickson)
I Am A....Random Auditory Activity (Dave Sladkey)
Fostering the Hypothesis Wrecking Mindset (David Cox)

Geometry

Foundations of Geometry

• Distance and Midpoint on a Map (Pam Wilson) 
• Points, Lines, Planes (Sarah Rubin)
• Geometry Sketch Game (Sarah Rubin)
• Geometry Basics Flyswatter Game (Julie Reulbach)
• Gumdrop Activity and Around the World Basic Geometry Review (Julie Reulbach)
• Shapely Search (Shannon) 
• Solving Equations Sudoku (Shannon)
• Perpendicular Bisectors (Sarah Rubin)
• Angleatrons (Lizzy-Sensei)

Angle Pairs

• Flash Cards (Sarah Rubin)
• Parallel Lines and Transversals (Sarah Rubin) 
• Parallelogram Mazes and Introducing Proof (Daniel Schneider)
• Transversals, Tape, and Stickies (Andrew Stadel)

Logic

• If Students Learn, Then We've Accomplished Something (Sam Shah)
• Intro to Logic (Pam Wilson)

Triangles

• Triangle Investigation (Pam Wilson)
• Triangle Inequality Theorem (Kate Nowak) 
• Equilateral Triangles (Fawn Nguyen) 
• Proving Triangles Congruent (UEN)
• SSA and ASA and All the Rest (Kate Nowak)

Similarity

• Designing a Fort (UEN)

Quadrilaterals

• Instagram for Quadrilaterals (Tina C)

Area/Surface Area/Volume/Perimeter

• I am a donut (Fawn Nguyen)
• Mr. Stadel's File Cabinet (Fawn Nguyen)
• Composite Area Worksheet
• Hands On Geometry Part II- Marshmallow Volume and Tissue Paper Nets  
• Hands On Surface Area of Prisms
• Area of Your Name and Area/Perimeter of a House  
• Surface Area Interactive Notes (Lisa Berjano)

Right Triangle Trig

• Pythagorean Theorem Game (Board, Cards) 
• Kicking Some Serious Triangle Booty (Kate Nowak)

Transformations

• Changes in Graphs Exploration
• Transformational Geometry Paper Clip Foldable (Jen)  
• Desmos App
• Transformation Foldable (Julie Reulbach)

Projects

• Rhombicosidodecahedron 
• 3D Object Project (Mimi) 
• Remodel (Sarah Rubin)

Constructions

• Starting to Dig Geometry? (Sarah Hagan)