Launch
🧪 Probability Mystery Lab
CCSS.Math.Content.HSS-MD.A.3
CCSS.Math.Content.HSS-MD.A.3
CCSS.Math.Content.HSS-MD.B.6
CCSS.Math.Content.HSS-MD.B.6
CCSS.Math.Content.HSS-MD.B.7
Assessment
Project Launch
Essential Question
Submission Required
Rotate through short mystery stations using spinners, dice, cards, random number generators, and quick scenario cards tied to topics like weather, sports, health screening, or social media trends. At each station, make an initial prediction, run trials, record theoretical and experimental probabilities in your Probability Investigation Notebook, and note any surprising differences. End with a brief whole-class debrief connecting trial results to fair decisions and real-world prediction questions.
Plan day
Day 1
Duration
90 min
Grouping
Small Group
Steps
8 steps
Lesson plan
8 steps · 90 min| # | What teachers do |
|---|---|
| 1 | Welcome the group, introduce the Probability Mystery Lab challenge, and explain that you will test whether first predictions match evidence in short real-world mystery scenarios connected to fair decisions and current issues. Have everyone set up a Probability Investigation Notebook page with columns for station title, initial prediction, sample space, theoretical probability, trial results, experimental probability, surprise, and possible real-world connection. (10 min) |
| 2 | Model one sample mystery station for the whole group using a simple spinner, die, card draw, or random number generator. Think aloud as you identify the sample space, make an initial prediction, calculate a theoretical probability, run a few trials, compare experimental results, and explain how probability can support or challenge a decision. (10 min) |
| 3 | Assign partners or trios, explain station norms, distribute recording tools, and preview the rotation task. Clarify that at each station you will read the mystery scenario card, make a prediction before testing, run the required trials, calculate theoretical and experimental probabilities, and note how the evidence might connect to a larger issue worth investigating later. (5 min) |
| 4 | Facilitate the first half of station rotations. At each station, have groups complete the scenario using tools such as spinners, dice, cards, or random number generators tied to topics like weather, sports, health screening, or social media trends. Prompt groups to test fairness, compare possible outcomes, and record any mismatch between expected and observed results. (25 min) |
| 5 | Pause for a midpoint reset. Invite you to compare one surprising result with another group, check calculations, and revise recording if needed. Ask which scenarios seem most connected to decisions people make in real life and which topics feel worth exploring in the larger project. (10 min) |
| 6 | Facilitate the second half of station rotations so groups complete remaining mystery labs. Continue circulating to question reasoning, press for complete sample spaces, and ask how trial size may affect experimental probability and confidence in a prediction. (20 min) |
| 7 | Lead a whole-class debrief in which you share one station where theoretical and experimental probability were close, one where they differed, and one way probability evidence could support a fair decision or challenge a common assumption in a real-world scenario. Capture possible project issue ideas on a visible list. (7 min) |
| 8 | Close with a quick written reflection in the Probability Investigation Notebook. Have you respond to: Which probability result mattered most today, how did your thinking change from prediction to evidence, and which current issue might you investigate in your final prediction project? Collect notebooks or exit responses. (3 min) |
Preparation (12 items)
- Set the total activity time at 90 minutes and post the agenda with station rotation times visible to all participants.
- Prepare 4-6 mystery stations using varied tools such as spinners, dice, cards, coins, and random number generators, making sure each station has enough materials for quick repeated trials.
- Write a short scenario card for each station that includes a real-world context, a clear question to predict, directions for running trials, and a prompt about how the result might influence a decision or strategy.
- Design scenario cards to include topics such as weather, sports, health screening, and social media trends so participants can analyze decisions and strategies using probability evidence.
- Check that each station allows participants to identify a sample space and calculate a theoretical probability before running trials.
- Create or copy a Probability Investigation Notebook page or handout with sections for initial prediction, sample space, theoretical probability, trial tally, experimental probability, comparison, surprise, and real-world connection.
- Prepare one fully worked model example for the opening demonstration that clearly shows how to move from prediction to calculation to trial data to interpretation.
- Label stations clearly, organize materials in separate bins, and test each station in advance to confirm directions are concise and the math is workable within the rotation time.
- Prepare chart paper or a digital board for whole-class debrief notes with headings such as Fair Decisions, Surprising Results, Strategy Questions, and Possible Project Topics.
- Plan partner or trio groupings in advance, including support pairings for participants who may need help with calculations, reading scenario cards, or recording data.
- Prepare sentence starters and calculation supports for participants who need scaffolds, such as 'The sample space is...', 'Theoretical probability = ...', and 'Our evidence suggests...'.
- Gather basic supplies including pencils, clipboards or notebooks, calculators if used in class, timers, and extra recording sheets.
Student-facing instructions
You will rotate through a series of short probability mystery stations using tools like spinners, dice, cards, and random number generators. At each station, your task is to first read the scenario card and make an initial prediction before doing any trials. Then you will identify the possible outcomes in the sample space, calculate the theoretical probability, run the required trials with your partner or group, and record the experimental probability in your Probability Investigation Notebook. You will also note any surprising differences between what you expected and what happened, and connect that result to a real-world issue or decision. You need your notebook page, a pencil, and the station materials. Your goal is to use evidence from probability to question assumptions, test fairness, and begin identifying a current issue you may want to investigate in your larger project.