Subject: Math

Lesson Length: 30 - 40 mins

Topic: Ratios & Proportional Relationships- Ratio & Percentage

Grade Level: 7

Objective: Evaluation

Standards: CCSS.MATH.CONTENT.7.RP.A.3

Standards:

Use proportional relationships to solve multistep ratio and percent problems.

Brief Description: Students will use percentages in order to determine how much to tip while creating a fun, mathematical comic.

Know Before You Start: Students should be familiar with solving multi-step problems involving ratios and percentages. This could serve as an informal assessment mid-unit.

Thanks For The Tip - Exemplar comic, panel 1 Thanks For The Tip - Exemplar comic, panel 2 Thanks For The Tip - Exemplar comic, panel 3 Thanks For The Tip - Exemplar comic, panel 4 Thanks For The Tip - Exemplar comic, panel 5 Thanks For The Tip - Exemplar comic, panel 6

Hook: Independently or with a partner, have students read the comic and work through the steps needed to solve Cirrus’s tipping problem. Regroup as a class to discuss their answers.

Activity:

  • Engage students in a discussion about what a tip is and why we give them.
    • 20% for superior service
    • 15% for adequate service
    • 10% for unsatisfactory service
  • Ask students for different real-life scenarios where they or their parents have provided someone with a tip.
  • Students will create a 3-5 frame comic telling a story about a situation where they need to provide a tip. Students should include:
    • The scenario that requires a tip (restaurant, hair cut, car wash, nail salon, Uber/cab ride, etc.)
    • The bill total before tip
    • The tip percentage
    • The tip amount
    • The total bill amount including tip

Closure: Share and discuss student comics with the class.

Differentiation:

  • Allow students to create more than one scenario for enrichment.
  • Provide sentence frames for the story. 
  • Allow students to use speech-to-text feature for their comic.
  • Provide the option for ELL students to tell the story in their home language.
  • Provide the bill total for students as needed.

Resources:

  • Comic to print or display: Comic 1.