Description of the lesson:
Orientation: Data Collection (LIT)
- Brainstorm as a class: How can we collect data or information? Accept responses and write them on the board so it is visible to the whole class. Possible responses may be research on the internet, conducting surveys, questionnaires, hear from someone or somewhere, see it for yourself. (WM: understanding)
- Ask students if they have come across primary and secondary sources before. If they have, ask them for their definitions, then elaborate and emphasise that primary data is data that you have collected yourself while secondary data is data which has already been collected and analysed by someone else. Circle the examples of primary sources on the board and ask students to write the examples down in two columns in their books (primary and secondary sources).
The purpose of this orientation is to clarify and emphasise that in statistics, primary data comes from primary sources and is data collected by the investigators and secondary data which comes from secondary sources is data collected by others.
Introduction: Kahoot! (ICT/LIT)
- Students participate in the following Kahoot! Quizzes to review their knowledge of variables as well as introducing them to situations in which census, samples and observations can be used to collect data. (AFL) (WM: fluency, problem solving)
1. https://create.kahoot.it/details/statistics/b4386927-468b-4ed6-b9ef-691f49d82eb8
2. https://create.kahoot.it/details/f00c955d-38af-436b-8981-df41b9ac0595
- As students are not yet familiar with data collection methods such as observation, census and sampling, as a class, define each of these terms based on the Kahoot! questions they have just answered and determine when it is appropriate to use each method. (WM: understanding)
This quiz serves to revise the material from the last few lessons as they will need that knowledge to comprehend this lesson's content. Students will be introduced to data collection methods in the second quiz and will be able to predict what it means to collect data by census, sampling and observation based on their prior knowledge.
Activity: Sorting Activity
- Have a table with the headings Observation, Census, Sampling displayed on the board.
- Students are in groups of 3 or 4 and each group randomly receives the statements from the second Kahoot! quiz (modified to use simpler language and more variety in scenarios). Groups discuss which collection method is most appropriate and nominates one person to stick it on the board with Blu-Tak in the corresponding column, with an explanation of their reasoning. Each group goes up one by one and the rest of the class decides whether they agree with their decision or not. (AFL) (WM: problem solving, reasoning, justification) There are 13 statements in total so each group will have at least 2 statements, depending on class size and group size, and each group member may have a turn at going up on the board.
- Make sure students copy the finished table into their workbooks as they will need to refer to it for Lesson 6: All About Sampling!
- Extension: If time permits, students try to think of their own examples of variables for which data can be collected by observation, census or sample. Share with the rest of the class. (AFL)
This activity helps to organise students' thoughts, clearly separating and identifying variables which can be collected by observation, census and sampling.
Conclusion: Kahoot! (ICT)
This quiz exercises students' fluency and reinforces their understanding of whether census or samples are being conducted.