Register with GEF for FREE to enjoy these great benefits! 

    • member only contests and raffles

    • sustainability program news and updates

    • significant discounts at GEF Institute

Note: If you have problems registering, contact This email address is being protected from spambots. You need JavaScript enabled to view it.


Taking a GEF Institute Course? Login by clicking here.






Join Us

Sign Up for National Green Week!
Please note: Your privacy is very important to GEF. We do not share or sell any of your data.  It is with the sole purpose of providing you with relevant information that GEF will contact you.

Welcome to the Sustainability Lesson Clearinghouse

Here, you can find free sustainability lessons to use in your class and upload your own lessons to share. Be sure to rate the lessons you use and leave comments for your colleagues!

All of GEF's lessons and programs are offered at no cost.  Become a member to support GEF and enjoy member only benefits! 
Join button_03

Professional Development

GEFinstitute LOGO_WEB GEF Institute offers affordable, online sustainability courses eligible for professional development or academic credit.
Give your resume a boost!

Sponsor a Teacher

Support educators in your community by helping them earn a Certificate in Sustainability or take an online course. Find out more about sponsorship!
Sustainability Lesson Clearinghouse

Measuring Water Flow Rates

Lesson Description:

This exercise works best with a deep sink or a shower. A one gallon container must fit under the faucet. If you want to measure the flow rate in other more shallow sinks in your school, check out the suggestions below. This exercise can also be conducted at home to determine personal water usage.
Lesson Type:
  • Audit
  • Experiment
  • Group Work
  • Project

Sustainability Topic:
  • Energy
  • Water
  • Waste Reduction

GEF Program Category:
  • Sustainable Water Challenge
  • Green Energy Challenge

Time Needed:
30 - 50 minutes
Materials Needed:
  • one gallon container
  • stopwatch or watch with second hand
  • school shower or large utility sink
  • calculator

School or Group:
Contact Email:
Lesson Documents:
application/pdf measuring-water1.pdf

The Sustainability Lesson Clearinghouse is brought to you in partnership with

Center for Green Schools