1. Mass and Weight: Kilograms and Grams
By: Rebecca Campbell

2. Standard
Grade 3
Standard 3.MD 2 (modified): Measure and estimate masses of objects using standard units of grams and kilograms. Add, subtract, multiply and divide to solve one step word problems involving masses that are given the same units using a drawing to represent problem.

3. Objectives
The students will be able to estimate and choose the correct mass of everyday objects using the standard: 1 gram= the mass of 1 paperclip.
The students will use solve one step word problem using multiplication, division, addition and subtraction answering with at least 50% accuracy.
The students will be able to solve one step word problems using addition and subtraction. The students will be able to solve one step word problems using multiplication and division.
The students will be able to arrange objects by their mass least to greatest.
The students will realize through discovery that objects besides 1 paperclip have the mass of one gram.

4. Our 5 Days of Fun! Day 3: Kilograms are Us See lesson plan Day 1:
Mass and weight the difference
Input: Read book: Millions to Measure
Apply deepen: word problems require adding and subtracting grams
Day 2:
Everyday Grams
See the lesson plan
Day 3:
Kilograms are Us
See lesson plan
Day 4:
Practice Grams and Kilograms
Word problems multiply or divide
Input: word problems using multiplication using kilograms
Apply: word problems using division
Day 5:
Review Stations

5. Lesson 1
Purpose: Today we will begin our new unit on mass and read a book Millions to Measure to learn the difference between mass and weight.
Objectives: The students will know the difference between mass and weight using comparison.

6. Lesson 1…
Set: The teacher will go over the definitions of mass and weight and the students will give example of things we measure the mass of.
Input: Read book: Millions to Measure
Apply/Deepen: The students will complete word problems require adding and subtracting grams
Closure: The teacher will go over the word problems by having the students sit in a circle and roll a ball around the circle.

7. Word Problems

8. Lesson 2
Purpose: Today we are going to begin our mass unit and learn about the use of grams in everyday life.
Objective: The students will be able to estimate and choose the correct mass of everyday objects using the standard: 1 gram= the mass of 1 paperclip.

9. Lesson 2…
Set: The teacher will ask: What is a gram? (A metric unit of mass equal to one thousandth of a kilogram)
Students will write in their math journals the definition of a gram.
1 gram =the mass of 1 paperclip
What are everyday things you can think of that would be measured using grams? Example: eggs, pet fish, US nickel, US dollar bill, gold, silver, chocolate
Input: The students will work with a partner to complete the attached worksheet estimating mass. The teacher will then ask these questions:
Which object had the greatest mass? Which object had the smallest mass?
The students will write their answers at the bottom of the worksheet. The teacher will then go over the correct masses with the class. The students will highlight the correct mass even if they got it correct with a marker or crayon.

10. Lesson 2…
Apply/Deepen: Set up on different tables will be boxes filled with different objects. The student will be given the mass of the objects in the box and will write the number of paperclips needed to balance equal the mass of the objects in the container.
Closure: The students will participate in a Stand Up/Sit Down answering the question: What are the other things that have the same mass as a paperclip?

11. Estimate Mass
Directions: Circle the mass that would best fit the object. Do your best The questions at the bottom will be asked by the teacher.

12. Number of paperclips needed
Box Number
What is in the box?
Mass of box
Number of paperclips needed
Balance the Mass
Directions: Write the correct number of paperclips needed to balance the mass of the contents of each box. Make sure each side has the same amount of grams. 1 gram =the mass of 1 paperclip

13. Lesson 3
Purpose: Yesterday we learned about the importance of using grams to measure mass. Today we are going to learn about kilograms and find our masses in kilograms.
Objectives: The students will use solve one step word problem using multiplication, division, addition and subtraction answering with at least 50% accuracy.

14. Lesson 3…
Set: The students will complete the “What has greater mass?” worksheet independently and put pencils down when done. The teacher will go over the worksheet pulling Popsicle sticks with students’ names on them for the answers.
Input: Students will write in their math journals 1,000 grams = 1 kilogram. Explaining using kilograms is simpler than just using grams because the numbers get to great. The teacher will then explain the average adult is 70 kilograms. The students will then make a prediction as to how many kilograms they are. The students will come to the front of the classroom by table and wait patiently to be weighed by the teacher. The teacher will then writ e the student’s weight in pounds and hand it to them written on a flashcard. The students will then return to their desks.

15. Order Mass
Directions: Rank each object or animal 3=smallest mass 2=medium 1=biggest mass. Write the number in the small box below the object or animal.

16. Lesson 3…
Apply/Deepen: The teacher will handout the pound to kilogram conversion chart and the students will find their weight. The students will then write their weight in kilograms on the back of the card and place it in the center of the table. The teacher will then collect the cards and shuffle them, places a pile of flash cards back on each table.
Closure: The students will complete the “Challenge” worksheet and hand it in. The teacher will grade it for completion and accuracy. The students must answer either question 1 or 2 right and either question 3 or 4 right to get full points.

17. Challenge
Directions: Follow the directions for each question. Do your best Ask for base ten blocks to help you solve problems if you need them.

18. Lesson 4 Purpose: Yesterday we learned about
Objectives: The students will Practice Grams and Kilograms using one step word problems that require multiplication or division.

19. Lesson 4… Closure: The teacher will go over all the word problems.
Set: Multiplication fact review game
Input: The students will solve word problems using multiplication using kilograms.
Apply/Deepen: The students will solve word problems using division.
Closure: The teacher will go over all the word problems.

20. Lesson 5
Purpose: We have learned about mass using grams and kilograms all week. Today we will practice our newly learned skills.
Objectives: The students will realize through discovery that objects besides 1 paperclip have the mass of one gram.

21. Lesson 5…
Set: The teacher will go over the directions for each station with the class.
Input/Apply Deepen: The students will count off by threes. The students will go to each of the following stations:
Mass of Egg’s: eggs contain pen cap, thumbtack, paperclip, US bill, ¼ teaspoon of sugar:
all equal one gram the students will write what their guesses are and place them in the box.

22. Lesson 5…
Problem Solving: There are 7 one-step word problems on strips of paper. The students will write the problem number in their Math Journal, write what operation was used, then solve the problem. The students will check the answers with a partner or ask teacher for help.
Measured as what?: The students will work as a table to place the different pictures on the side in which they think the object should be measured in. The teacher has the answer key and the students will raise their hands when finished sorting to see their score.

23. Lesson 5…
Closure: The teacher will pull out guesses from the box at egg station. Then open each egg and explain how all the objects equal one gram. The students will then tell the teacher where all the objects at the Measured as What Station go.

24. Answer Key Measured as what? Board:
Grams:
• Eye glasses
• Newspaper
• Salt shaker
• Bottle of water
• Rose
• Kitten
Kilograms:
• Glass flower vase
• Watermelon
• Backpack with books
• Rolling pin

25. Assessments
Day 1: Assessment: The students will write a two minute write about the difference between mass and weight. This will be their ticket out the door and will not be graded but read for understanding.
Day 2: Assessment: The “How many paperclips” worksheet will be graded for completion.
Day 3: Assessment: The students will complete the “Challenge” worksheet and hand it in. The teacher will grade it for completion and accuracy. The students must answer either question 1 or 2 right and either question 3 or 4 right to get full points.
Day 4: Assessment: The students will be observed while they are answering the word problems to see where they need help.
Day 5: Assessment: The teacher will observe the student’s performance on the “measured as what” station.

26. Please Read: Dear Family and Friends of Ms. Campbell’s Class,
Thank you for your participation and cooperation this year. This week we will be learning about the mass of objects using grams and kilograms. As you go to the store or are eating dinner, please ask your child about what things are measured using grams and kilograms. The mass of a paperclip is about one gram. The children will be comparing things to paperclips to find their masses this week for manipulatives. We will also be using each child’s weight to create flashcards that convert pounds to kilograms using a chart. The child’s name will not be placed on the card and I will collect, shuffle, and redistribute the cards once they are created by each child. Knowing how many kilograms they are allows each child to have a benchmark in their mind in which to compare the mass of other objects. Please call or me with any questions you may have. We will be learning a bunch of new things this week and we hope to show you our knowledge of mass this week!
Educational yours,
Ms. Campbell

27. Thank You!