Activity synopsis

No. of 90 min. lessons

The first cycle: Sampling methods (a population of 496 students)

Activity 1: The real world: time to ask and time to sample (n=18)

4.5

Introduce to the main topic of the project (“Children make a change”) and the sub-topic of the first cycle (technology); participate in an EDA activity following the statistical investigative cycle; present investigations.

Activity 2: The probabilistic world: The strings activity (n=10 out of 18 strings)

2.5

Explore bias and random sampling methods by drawing samples from a population and compare between the drawn samples; reason with SGDs.

The second cycle: First random sample (a population of 1,300 students)

Activity 3: The real world: Data collecting (n=60)

2

Introduce to the activity context (sports and gender) and the online questionnaire; plan the random sampling method (a raffle), and collect data (15 grade 2, 4 and 6 students from their school and 15 eighth graders from their future middle school). 

Activity 4: The real world: data analysis of the first sample (n=60)

2

Investigate a random sample (60 cases, 27 variables) using TinkerPlots; model conjectures about the population (hands-on); present investigations.

Activity 5: The probabilistic world: Model the population and draw random samples (n=60)

3

Model a conjecture about the population (TinkerPlots); investigate random simulated data samples (60 cases, without replacement), invent methods to compare between samples; present investigations.

Activity 6: The probabilistic world: What can we learn from 100 samples? (n=60)

1

Generate and reason with SGDs of 100 samples; present investigations.

Activity 7: The probabilistic world: The minimal and trustworthy possible sample.

1

Search and choose the minimal and trustworthy sample that can be collected by the students; present investigations.

The third cycle: Second random sample (a population of 1,300 students)

Activity 8a: The real world: Collect and investigate the second sample (n=105)

2

Collect additional random sample (15 students of grades 2, 4 and 6); Investigate a random data sample (105 cases, 2 variables) using TinkerPlots; present investigations.

Activity 8b: The probabilistic world: Model the population and reason with a SGD (n=105)

1

Model conjectures about the population using the Sampler, draw and compare between random samples taken from the constructed model, reason with the SGD.

Total number of 90-minute lessons:

19