Beacon Lesson Plan Library

Chips Ahoy A Thousand Chips In Every Bag

Amelia McCurdy
Santa Rosa District Schools


Nabisco claims to sell 1000 chocolate chips in every 1 pound bag of Chips Ahoy! Students use their problem solving skills and data collection to determine if the claim is true.


The student generates and collects data for analysis.

The student finds the range, mean, median, and mode of a set of data.

The student describes real-world data by applying and explaining appropriate procedures for finding measures of central tendency.


-Chips Ahoy! Worksheet (see associated file)
-2 cookies per student (a 1 pound bag has about 48 cookies)
-Overhead projector or chalkboard
-Wet wipes for clean up


1. Copy worksheet (one per student).
2. Gather materials.


1. Show students the bag of Chips Ahoy! Cookies. Ask students if they believe the Nabisco claim of a thousand chips in every bag. Discuss why the company can claim "a thousand chips in every bag." Is this possible?

2. Ask students to brainstorm ways to determine if there are a thousand chips in this bag. Record ideas on the overhead or board. Discuss the method students think is the best. Lead students to conclude that taking a sampling of cookies and determining the average number of chips per cookie is an effective method.

3. Pass out cookies. Tell students: One cookie is for counting; the other is to be eaten at the end of the lesson. (You may want to pass out the second cookie at the end of the lesson.) Ask students to examine their cookies and estimate the number of chips in their cookies just from looking at them. As a class, you will need to decide if a chip is a half a chip and which are two chips. Students will need to record their estimates on the worksheet.

4. While students share their estimates, record the estimates on the overhead/board. Using their estimates, students will create a stem and leaf plot and determine the mean, median and mode. Using package information, they will determine the number of cookies in a bag and discover how many chips they have estimated are in a bag. Model this for students and ask for questions as you complete this part.

5. Now students are ready to count chips. Using a toothpick, students will ‘dig out’ the chips from one cookie and take a count. Again record the results and have students answer the rest of the questions. Circulate and offer feedback as needed.

6. Nabisco has a Website with fun facts about Chips Ahoy! Cookies. There are a few questions based on these fun facts for students to answer, but these are not part of the instruction or assessment.


Assess students as they collect data and participate in the class discussion when recording class data.

Assess the worksheets (see associated file) for accuracy and an appropriate explanation for #15 based on the data generated and analyzed.

Offer feedback and guidance as students work.

Web Links

Web supplement for Chips Ahoy A Thousand Chips In Every Bag
Chips Ahoy!

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