K-5 Math Lesson Plan

Teacher: Harmon/Rogers / Grade: 5 / Date(s): August 2012 Math Class
Unit Title: Unit 2-Operations with Whole Numbers and Decimals Task 3 Day 1 / Corresponding Unit Task:
Lessons Prior to “Our School’s Food Drive Collection Sheet”
Essential Question(s):
Why is it important to determine the unit rate when purchasing items?
Materials/Resources / Essential Vocabulary
Teacher:
-Grocery Ads from 3 different stores
-Bag of starbursts
-Copies of the chart for students
-Copies of homework for students / Student:
-Math journals
-Pencils
-Calculators
-Chart
-Homework sheet / Unit, rate.
Learning Experience
8 Mathematical Practices:
1. Make sense of problems and persevere in solving them.
2. Reason abstractly and quantitatively.
3. Construct viable arguments and critique the reasoning of others.
4. Model with mathematics.
5. Use appropriate tools strategically.
6. Attend to precision.
7. Look for and make use of structure.
8. Look for and express regularity in repeated reasoning. / Common Core State Standards:
5.NBT.6
Find whole number quotients of whole numbers, with up to four-digit dividends and two digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
I Can Statement(s):
I can determine the unit rate when purchasing items.
Activating Strategy/Hook:
1.  Pose the following problem on the board
2.  Have the students read the following problem:
There is a 1 pound bag of starburst sitting in the front of the room with 25 starbursts waiting for you. Your job is to determine the weight of each starburst in ounces. Use your calculator to determine the weight. Raise your calculator when you are finished.
3. Each student will get a starburst when they are finished.
Teacher Directed:
(How will students become cognitively engaged and focused?)
·  Congratulations you are now the proud owner of a Hot Dog Stand complete with no supplies. You will need to purchase from your local grocer the following items: hot dogs, buns, chips, soda, and cookies. When you go to the store you find out that hot dogs cost: $4.00 for a package of 8, hot dog buns cost: $2.40 for a package of 8, For a box of 12 bags of chips the cost is $1.20, Sodas come in 12 packs and cost $3.60, cookies come in bag of 25 for the cost of $.25.
Guided Practice:
·  Explain to the students how they can find the unit price of many items in a grocery circular.
·  The unit price is the price per unit of measurement.
·  For example: a 16-ounce can of corn might sell for $.80. The price for one ounce (1 measuring unit) of the corn would be 5 cents.
·  Share with the students how to determine the price per unit of an item.
·  In the case of the can of corn, students might divide the price of one can of corn (80 cents) by the number of units (16 ounces or 16 units) in that can to determine the price per unit.
·  Presented in another way, students might represent the above problem as an algebraic equation:
80/16 = x/1
16x = 80
x = 5
Independent Practice:
·  Provide time for students to practice solving several similar per-unit problems. That can be done with newspaper, pencil, and calculator.
·  Students should round their answers to the nearest hundredth.
·  Now students are ready to use an actual store circular to solve specific problems.
·  Have the students make a chart and record the following information. (see chart attached to the lesson)
·  Allow students time to complete the activity.
·  Discuss results with the class
Closing/Summarizing Strategy:
Ticket out the door
Students will complete the unit rates worksheet in task 3.
Differentiation Strategies
Extension / Intervention / Language Development
·  Have students make price comparisons for like items at different stores.
·  Then have them use the price-comparison information to create a double bar graph illustrating the cost per unit of items at various stores. / Revisit the teacher directed activity with these students. / Pictures of the following: grocery circular, scenario with unit price (you go to the dollar store and buy 4 rulers for a $1.00 determine the price per ruler).
Assessment(s):
Student Outcomes
Teacher Reflection: (Next steps?)

Name ______Date ______

Grocery Circular Chart

Item (Including Brand name) / Store / Price / Size / Cost Per Unit

Guilford County Schools Office of Curriculum & Instruction May 2012