A 60 minute lesson in which students will apply knowledge of decimals and percentages to a real-world context.
As an introduction to the mathematics investigation, ask the students if they have ever planned a party or celebration. Ask questions, such as:
What did you need to organise?
What items did you need to buy?
How did you prepare the venue?
Record the ideas of the students in a mind map on the board.
Provide the students with a copy of the Decimals and Percentages Investigation – Prepare to Party. Read through the scenario, the task, the teacher’s conditions and the procedure with the students. Answer any questions the students may have about the task and check that they understand the task instructions.
As a class, decide upon a reasonable budget for the celebration. This will depend upon circumstances such as class size. Once an agreement has been reached, have the students record the agreed budget on their investigation booklets.
Browse through the party supplies catalogue as a class. Point out to the students the discount rate on each set of items. Encourage the students to suggest some combinations of food, party decorations and serving supplies that could be purchased for the class celebration.
Allow the students to calculate the discount amount and sale price for each of the items in the party suppliescatalogue. Students should record their answers on the worksheet provided in the investigation booklet. If teachers plan to use the investigation as an assessment tool, students should be encouraged to complete this section of the task independently.
Check on how the students are progressing with the investigation. The speed at which the students will complete these initial calculations will vary.
Allow any fast finishers to progress to the next stage of the investigation.
Simplify the investigation for less capable students by reducing the number of items on the party supplies catalogue.
Suggested Assessment Strategies
used strategic whole class or individual questioning
observed student participation during learning activities