Discuss probability in language with your students. Start by drawing a spectrum on the white board. Label the left end *impossible* and the right end *certain.* Ask students to write phrases that involve probability on Post-it Notes. Then ask them to pin their phrases on the spectrum. Phrases they might come up with: *50/50 chance,* *slim chance,* *fat chance,* *even odds,* *possible.* After adjusting the position of Post-its as necessary, relate the spectrum and its phrases to numbers. For example, *50/50* is \(50\% = 1/2 = 0.5,\) *impossible* is \(0\% = 0 = 0.0,\) and *certain* is \(100\% = 1 = 1.0.\) Watch this for a demonstration.

Next, give your students these challenges:

- Number the Sides by NRICH
- 2019 Math Kangaroo Levels 3-4 Problem #17 by STEM4all

Conclude by leading this investigation:

Number One! (fractions, primes)

by MathPickle