K-12 Teaching and Learning From the UNC School of Education

Important Announcement about Online Courses and LEARN NC.

Important Message about LEARN NC

LEARN NC is evaluating its role in the current online education environment as it relates directly to the mission of UNC-Chapel Hill School of Education (UNC-CH SOE). We plan to look at our ability to facilitate the transmission of the best research coming out of UNC-CH SOE and other campus partners to support classroom teachers across North Carolina. We will begin by evaluating our existing faculty and student involvement with various NC public schools to determine what might be useful to share with you.

Don’t worry! The lesson plans, articles, and textbooks you use and love aren’t going away. They are simply being moved into the new LEARN NC Digital Archive. While we are moving away from a focus on publishing, we know it’s important that educators have access to these kinds of resources. These resources will be preserved on our website for the foreseeable future. That said, we’re directing our resources into our newest efforts, so we won’t be adding to the archive or updating its contents. This means that as the North Carolina Standard Course of Study changes in the future, we won’t be re-aligning resources. Our full-text and tag searches should make it possible for you to find exactly what you need, regardless of standards alignment.

Learn more

Related pages

  • ACC basketball: The students will use ACC basketball statistics to practice the process of converting fractions to decimals then to percents and will learn how to create and edit a spreadsheet. They will then use this spreadsheet to analyze their data. This unit is done during the basketball season.
  • Sale! Sale! Sale!: Consumer math often requires shoppers to analyze and compare the same products at different stores. In addition to price variations, retailers offer incentives or discounts. This lesson requires students to be informed consumers who calculate three purchasing options and conclude which is the best deal. The activity enables students to apply mathematics to a real-life situation.
  • Trashketball review for ratios, fractions, decimals and percents.: This lesson will help the students with changing from ratios to fractions, fractions to decimals, and decimals to percents.

Related topics


Please read our disclaimer for lesson plans.


The text of this page is copyright ©2008. See terms of use. Images and other media may be licensed separately; see captions for more information and read the fine print.

Learning outcomes

Students will:

  • use fractions and estimation in calculating statistics.
  • describe how to calculate percentages to decimals.
  • calculate batting averages and pitching averages and learn to connect their findings to classroom activities.
  • demonstrate how to display their data in a variety of graphs.

Teacher planning

Time required for lesson

2 Hours


  • baseball cards
  • scratch paper
  • pencils
  • colored pencils
  • rulers
  • calculators
  • drawing paper

Technology resources

  • Laptop, projector, and SmartBoard are necessary for presentations.
  • Spreadsheet program for ready display.


  1. Students should complete an assignment dealing with calculating percentages, changing decimals to percents, and creating fractions using decimals.
  2. Teacher should demonstrate how to calculate a season’s batting average from using a baseball card as an example and to chart it on a spreadsheet.
  3. Teacher should demonstate how to calculate a pitcher’s earned run average and chart it on a spreadsheet.


  1. The teacher should begin the lesson by telling students how sports statistics help professional athletes (baseball in this case) negotiate a better contract that will get them more money due to their good performance. A bad average could make a players net worth drop dramatically as well.
  2. The teacher can then pass out a baseball card that has a batting average on the back to each of the students and let the students familiarize themselves with the statistics on the back of the card.
  3. The teacher can then demonstrate how to determine a player’s season batting average by dividing total hits by the number of times the player went to bat(ab{at bats}). By rounding the average off to the thousandths place, a student can get the average. With the data from each year(combined and then averaged), students will be able to get a lifetime average and determine how well a player has played during the course of his career.
  4. Students will then fill in their data on the spreadsheet provided by the teacher.
  5. The next step for the students would be to change the batting average to a percent by moving the decimal to the right two spaces and then they have the percentage of times at bat a player gets a base hit.
  6. To change the percentage to a fraction, the teacher will have students round off the percentage and divide it by 100 and reduce the fraction to lowest terms.
  7. Allow students to present their findings to the class using a SmartBoard and projector or a class-made display to “show off” their data for their superstar.
  8. Allow students to use the rubric to grade each others work.


  • Students will be allowed to evaluate each others project using a rubric provided by the teacher. (50%)
  • Teacher will also evaluate each presentation and calculations provided by each student. (25% + 25%)

Supplemental information


Related websites

This is a website that slow learners can use to help them calculate the batting averages of baseball players:


Teaching kids how to calculate averages (decimals), fractions, and percents by using something that a lot of kids collect such as baseball cards can be meaningful by helping them to remember skills they will need throughout their lives.

  • Common Core State Standards
    • Mathematics (2010)
      • Grade 6

        • Ratios & Proportional Relationships
          • 6.RPR.3Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations. Make tables of equivalent ratios relating quantities with whole-number...
      • Grade 7

        • Expressions & Equations
          • 7.EE.3Solve multi-step real-life and mathematical problems posed with positive and negative rational numbers in any form (whole numbers, fractions, and decimals), using tools strategically. Apply properties of operations to calculate with numbers in any form;...

North Carolina curriculum alignment

Mathematics (2004)

Grade 8

  • Goal 1: Number and Operations -The learner will understand and compute with real numbers.
    • Objective 1.01: Develop number sense for the real numbers.
      • Define and use irrational numbers.
      • Compare and order.
      • Use estimates of irrational numbers in appropriate situations.
    • Objective 1.02: Develop flexibility in solving problems by selecting strategies and using mental computation, estimation, calculators or computers, and paper and pencil.
  • Goal 4: Data Analysis and Probability - The learner will understand and use graphs and data analysis.
    • Objective 4.03: Identify misuses of statistical and numerical data.