1. Activity nr 23
Create a “tree consumption” board
Measure the paper consumption we have
each month (books, notebooks, photocopies)
and “add” some cut trees on the board
respectively.

2. 17 x = 1t
= 59kg

3. Step 1.
Fill in the number of students of each classes
in the program

4. Step 2.
Take one student’s set of school books.

5. Step 3.
Weigh it.

6. Step 4.
Fill in the weight of books in the program to get a
total weight of all sets of school books.

7. Step 5.
Take a set of notebooks of one student in this
class.
Step 6.
Weigh it.

8. Step 7.
Fill in the weight of notebooks in the program to get
a total weight of all sets of notebooks.

9. Step 8.
Take one student’s set of additional school
supplies (drawing pads etc.)
Step 9.
Weigh it.

10. Step 10.
Fill in the weight school supplies in the program to get
a total weight of all sets of additional school supplies.

11. Step 11.
Fill in the number of photocopies in the right place.

12. The program counts the weight of
used paper and converts the result
to cut down trees.

13. Created by
Polish Comenius Team