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Toronto Catholic District School Board

TCDSB Earth Hour Challenge                                      

March 27, 2020 

from 10:00 a.m. to 11:00 a.m. 

Join the global movement and turn out the lights where it is safe to do so and where it will not adversely disrupt the normal classroom teaching. 

Tweet @TCDSB or tag us on Instagram using the hashtag #TCDSBEarthHour and let us know how your school is celebrating Earth Hour. 

Operational suggestions for schools and facilities:

  • Talk to your staff and any community groups that use your building about how to make Earth Hour safe and successful. 
  • Exterior of building – ensure that external lights and parking lot lights are turned off where possible, keeping safety / security lighting in mind. 
  • Hallway lights – reduce to minimal lighting to ensure student and staff safety, in accordance with the school’s occupational safety policy. 
  • Classroom lights – turn off if this does not adversely disrupt the normal classroom teaching. 
  • Staff Areas – ensure non-essential lights are turned off including staff lounge, principal’s office and reception area. 
  • Gymnasiums / Cafeterias / Library – turn lights to a minimum in these areas and post signs or a poster to let visitors to the school know about your Earth Hour commitments. 


  • Acting Today, Shaping Tomorrow is a Ministry document on the future of environmental curriculum in Ontario and can be downloaded along with other environmental resources from the Ministry of Ontario​ ​

We hope that this material is helpful and will provide opportunity for all schools to participate.​​​