6.RP.1 Ratios

TEACHER:Jennifer Mraz / SUBJECT: 6th Grade Math
STANDARD: 6.RP.1 Understand the concept of a ratio and use ratio language to describe a ratio
relationship between two quantities.
STUDENT TARGET:
Understand that ratios and proportional relationships are used to express how quantities are related and how quantities change in relation to each other.
EVIDENCE OF MASTERY (MEASURABLE):
SUB-OBJECTIVES, SWBAT
Define the term ratio and give examples of ratios.
Write a ratio that describes a relationship between two quantities.
Explain the relationship that a ratio represents.
KEY VOCABULARY:
ratio
relationship
quantity / MATERIALS:
This lesson was adapted from Stephanie Conklin’s lesson at the link below. To view the lesson, you must sign up for a free account. *the video listed in the lesson does not play.

  • Whiteboard and marker
  • Lucky Charms Ratio Sheet (see attached word document)
  • Individual bags of Lucky Charms Cereal
  • Photograph to use for real world ratios (see examples below or the lesson as the link above).

ENGAGE (MAKE CONTENT AND LEARNING RELEVANT TO REAL LIFE AND CONNECT TO STUDENT INTEREST)
Are there more marshmallows or oat pieces in a box of Lucky Charms?
BEFORE / TEACHER WILL:
Ask discussion question:
Does anybody know what a ratio is?
Model the ratio of students wearing glasses (5) to students not wearing glasses (25) by asking students to stand up and be counted.
Model the ratio of no glasses to glasses by having students stand up and be counted.
Model the ratio of glasses to total number of students in the class. / STUDENT WILL:
Discuss question with a shoulder partner and share answers with the class.
Watch the teacher model the ratio and write it on the board. Teacher will say 5 to 25.
Watch the teacher model the ratio and write it on the board. Teacher will say 25 to 5.
Watch the teacher model the ratio of glasses to total number of students in the class and write it on the board. Teacher will say 5 to 30.
CO-TEACHING STRATEGY IF APPLICABLE
DURING / TEACHER WILL
Model the three ways to write a ratio using fractions, to, and the colon.
Pass out the Lucky Charms Ratio Sheet and bags of Lucky charms to groups of two students. Ask students to follow the directions on the paper to discover the answer to the engage question “Are there more marshmallows or oat pieces in a box of Lucky Charms? / STUDENT WILL:
Write the glasses ratios in three different ways using a whiteboard and share their ratios with a partner.
Complete Lucky Charms Ratio Sheet. Compare results with the class to create a final conclusion and answer to the question.
CO-TEACHING STRATEGY IF APPLICABLE
AFTER / TEACHER WILL:
Ask students to discuss with their partner the definition a ratio and if order matters when writing ratios.
Display a photograph on the LCD screen and ask students to write as many examples of ratios (in all 3 ways) as possible.
Homework: Ask students to go home and write 5 different examples of ratios. / STUDENT WILL:
Discuss ratios and order of writing ratios and write answer on ratio sheet.
Look a picture and write ratios using all three methods (fraction, to, and colon). Write ratios on sheet.
Make a list of ratios from examples in your home and write them on ratio sheet.
CO-TEACHING STRATEGY IF APPLICABLE

Possible ratio pictures to show on the LCD screen.