Lesson Plan

What does the graph say? (dinga ding ding)

This app flow teaches students to read and interpret graphs. Since scales are important to the graph and what it means, they will ensure that the scale is appropriate as not to mislead others.
Lori A.
Classroom teacher
HEMS Huntington, WV
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My Grades 8, 9
My Subjects Math

Students will be able to:

  • Research the internet for data
  • express data in a spreadsheet
  • interpret data and the scales
  • write descriptions about data

Math.8.SP.1: construct and interpret scatter plots for bivariate measurement data to investigate patterns of association between two quantities

Math.8.F.5: describe qualitatively the functional relationship between two quantities by analyzing a graph (e.g., where the function is increasing or decreasing, linear or nonlinear). 

Grades 8
All Notes
Teacher Notes
Student Notes

1 Hook

Activity: Investigating

Go to http://illuminations.nctm.org/Lesson.aspx?id=2844. Print the activity and students will complete the following:

  • Students will choose 12 random numbers from 0-10
  • Students will plot the points and connect the points by straight lines
  • Students will then title and label their graph and tell a story about what is happening in the graph. 

2 Direct Instruction

Free, Paid

Students will read along with the teacher as we talk about graphing and interpretations from:


In a discussion, students will make and analysis of why ice cream sales increase in the summer. It is important that the kids come up with their own interpretations to insure understanding. 

Students will discuss key words in this lesson:

data collection





3 Guided Practice

Activity: Exploring

Students are now going to explore the real-world from their own point of view. (ex. time of year and peoples clothing) The topic must be comparing two different items of data.

They are going to explore the internet and find solid quality data that they can express using 10 different units (days, weeks, months, years, etc). The topic should be one about something they are interested and know plenty of information.

Students should collect their data, because they are going to use a spreadsheet to enter their information.

4 Independent Practice

Google Drive
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Students will create a spreadsheet using either using Excel or GoogleDrive to express their data. .

Once they have their data entered, they will create a graph of their data, ensuring that their scale does not make their graph is misleading. 

Students should double-check the following:

  • axes must be labeled
  • graph must have a title
  • lines must be defined and have labels
  • Graph should be eye catching

After making the graph, students will write a 350 word description about their graph, this needs to include the interpretation, mathematical terms, and tell whether the relationship is a correlation or causation.

The description should be as thorough as possible, explain trends, relationships, and explanations for the relationships that are recognized. 

5 Wrap-Up

Free, Paid

Students will present their information using a prezi, power point, or Imovie. Other students will complete a peer review of their classmates work. Students should be ready to defend their work as they answer questions I will pose to them about their data.