• CCSS.MATH.CONTENT.K.MD.A.1 -Measurement and Data
• CCSS.MATH.CONTENT.1.MD.A.1 - Measurement and Data
• CCSS.MATH.CONTENT.2.MD.A.1 - Measurement and Data
• CCSS.MATH.CONTENT.3.MD.D.8  -Measurement and Data

Required Project Materials

• Dollhouses (affordable ones can be found on the Target Online Store here (even comes with cardboard Christmas tree): https://www.target.com/p/color-your-own-corrugate-gingerbread-dollhouse-kit-wondershop-8482/
• Miniature Christmas Trees (if difficult to find, can be made out of green construction paper)
• Mesh Pieces
• String
• Cloth Pieces
• Popsicle Sticks
• Cardboard Pieces
• Scotch Tape
• Pebbles
• Dowel Sticks
• Rulers
• Paper
• Pencils

• "How the Grinch Stole Christmas" 1966 Youtube Clip- https://www.youtube.com/watch?v=Z_SFt_WNHfU
• Candy Canes (Prizes)

• "How the Grinch Stole Christmas" 1966 movie
• How the Grinch Stole Christmas book

Before the Lesson/Background Information

• Assemble the dollhouses and miniature trees if needed.
• Read or watch "How the Grinch Stole Christmas" to the class.
• Introduce rulers and what they are used for.

The Lesson

1. Play the Youtube clip of when the Grinch steals the Christmas toys and decorations from Whoville.
2. Tell students that today they are going to create ways to protect their house from the Grinch! They can either design a trap to catch the Grinch or a machine to protect the Christmas tree.
3. Inform students that they need the traps or machines to be the right size because the Grinch is very sneaky! Students need to measure what they're making as they build.

1. Assign students to groups of 2 or 3 and give them a dollhouse and  miniature Christmas tree. Supplies for the build can be either passed out to the groups or put on a supply table for students to gather as needed.
2. Students will work together to plan, design, construct, measure and test their traps or machines with the various materials. 

1. Have each group demonstrate how their traps or machines work to the whole class.
2. Discuss with students how they would improve their traps.
3. Have class vote on who built the best trap and who built the best machine. Award candy canes to the winners!