🗂️ Challenge Cards · Grade 3
Dino Number Line
Hallway edition
Tape a long line on the floor from 0 to 2. Each dinosaur card tells you how big its stride is. Walk the line in strides, say the fraction at every step, and find out where each dino ends up.
3.NF.A.23.NF.A.3How to use: Setup: tape a 6-foot line on the floor. Mark 0 at one end, 1 in the middle, and 2 at the far end. Print the cards and place them in a stack at 0.
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Card 1
Stegosaurus
3.NF.A.2Stride length: 1/2. Starting at 0, take 3 strides. Say each fraction out loud as you land. Where did you stop? Is that more or less than 1?
You need: Tape line, this card
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Card 2
Velociraptor
3.NF.A.2Stride length: 1/3. Take 3 strides. Where are you? Now take 3 more. Mark your spot with tape and write the fraction next to it.
You need: Tape, marker
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Card 3
Compsognathus
3.NF.A.3Tiny stride: 1/6. How many strides does it take to reach 1? Which gets to 1 faster, 1/6 strides or 1/3 strides? Why?
You need: Tape line
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Card 4
The Race
3.NF.A.3Stegosaurus takes 2 strides of 1/2. Velociraptor takes 3 strides of 1/3. Who is farther along? Prove it by walking both.
You need: Two dinos (or one kid, twice)
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Card 5
Mystery Spot
3.NF.A.3A grown-up puts a sticky note somewhere on the line. Name the spot as a fraction using halves, then again using sixths.
You need: Sticky note
0 of 5 cards done