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

Electrolysis of Water

Lesson Description:
Students observe the electrolysis of water using either photovoltaics or a battery as the electric energy source.
Lesson Type:
  • Experiment

Sustainability Topic:
  • Water

GEF Program Category:
  • Sustainable Water Challenge

Time Needed:
1 hour
Standards Addressed:
National standards: 5-8

-Int-b: 1.e. There are more than 100 known elements that combine in many ways to produce compounds, which account for the living and nonliving substances in the world.

-Int-b: 3.e. Electrical circuits provide a means of transferring electrical energy.

-Int-b: 3.f. In most chemical and nuclear reactions, energy is transferred into or out of a system. heat, light, mechanical motion, or electricity might all be involved in such transfers.
Materials Needed:
  • Handouts included
  • Photovoltaic cell (3v min) or 9-volt battery (one per group)
  • Piece of aluminum foil, approx. 6 cm x 10 cm (two per group)
  • Electrical wires with alligator clips (two per group)
  • Beaker or small bowl (one per group)
  • Water
  • Stirring rod or spoon
  • Graduated cylinder (several per class)
  • Science journal 

School or Group:
Energy Education and Workforce Development
Contact Email:
Located in: Science

The Sustainability Lesson Clearinghouse is brought to you in partnership with

Center for Green Schools