Name: ____________________________________ Date: ______________ Period: ______
Print pages 1 to 3 for every student. Page 4 is the sample data set for classes that could not collect their own, and for grade 6. Use the grams column if you weighed, and the items column if you counted. Every calculation works the same way in either unit.
Part 1. Where food waste happens
| Where | One real example | About what share of all food waste |
|---|---|---|
| On the farm | ||
| At the store | ||
| At home | ||
| In cafeterias and restaurants |
Circle the one that surprised you.
My guess before the lesson: ______ pounds per person per year.
The real number is about: ______ pounds per person per year.
Part 2. Our audit
Our method (circle one): we weighed / we counted items
Days collected: ______ Number of people the bins came from: ______
| Bin | Weight in grams | Weight in ounces | Number of items |
|---|---|---|---|
| EDIBLE (somebody could have eaten it) | |||
| NOT EDIBLE (peels, cores, bones, grounds) | |||
| TOTAL |
The edible bin is the one we do the math on. Peels and cores were never going to be eaten, so they are not the number we are trying to change.
The one thing in the edible bin that bothered me most: ______________________
Part 3. The math
Show your work in every box. Label every answer with its unit.
Calculation 1: per person per day
Total edible waste ____________ divided by number of people ____________ = ____________ per person for all the days
Then divide by the number of days ____________ = ____________ per person per day
Work:
Calculation 2: per person per school year
Per person per day ____________ times 180 school days = ____________ per person per school year
Work:
Convert to pounds: divide grams by 454, or divide ounces by 16.
____________ pounds per person per school year
Calculation 3: the whole school
Per person per school year ____________ times number of students in the building ____________ = ____________
In pounds: ____________ pounds of edible food per school year, whole school
Work:
Check your units. Circle the unit of your final answer: grams / ounces / pounds / items
Part 4. Three changes
Each change has to name who does what and when. "Waste less" is not a change.
| # | Who | What they do | When |
|---|---|---|---|
| 1 | |||
| 2 | |||
| 3 |
Which of your three costs nothing? ______
Which one would still be happening in a month? ______ Why that one?
Class vote result, the three changes we are actually doing:
- ___________________________________________________________________________
- ___________________________________________________________________________
- ___________________________________________________________________________
Exit card
Our class wastes about ____________ pounds a year, and the one change I will actually do is __________________________________________________________________.
Page 4: Sample data set
Use this if your class could not collect its own data. Say out loud that it is sample data and not ours.
A class of 24 students collected food scraps for 2 days.
EDIBLE bin: 1,440 grams total.
NOT EDIBLE bin: 2,160 grams total.
The building has 600 students.
Work it through:
1,440 divided by 24 = ______ grams per person for 2 days
______ divided by 2 = ______ grams per person per day
______ times 180 = ______ grams per person per school year
______ divided by 454 = about ______ pounds per person per school year
______ times 600 students = about ______ pounds for the whole school
Grade 6 version: do the first four lines only. Stop before the whole-school line.
Page 5: Grade 8 stretch, put a dollar on it
Use an average food price per pound from this week's store circular.
Average price per pound I am using: $__________ (what food? ______________)
| Question | Work | Answer |
|---|---|---|
| What does one person's yearly edible waste cost? | $ | |
| What does the whole school's yearly edible waste cost? | $ | |
| What could the FACS room buy with that? |
One sentence: the number that surprised me most was __________________ because ___________________________________________________________________.