The Ontario Student Debating Union is a charitable organization that hosts and promotes competitive debate for Ontario students up to Grade 12. OSDU organizes a Provincial Championship every spring as well as a variety of regional debates and workshops. It also works with the Canadian Student Debating Federation and helps select students to represent Ontario at national and international debating events. (Read more)



OSDU's 2017-2018 Registration is now available online for all schools interested in competing in any OSDU event (Senior, Junior and/or French) during the 2017-2018 school year.* The fee schedule for this year will be as follows: 

Registration PRIOR TO October 1:                    $100
Registration from October 1 - November 15:   $125

All schools intending to compete in OSDU Senior events must register by November 15, 2017.  
For all schools intending to only compete in the OSDU Junior Provincials tournament, registration is due on February 1, 2018

The OSDU 2017-2018 online registration form can be accessed here: 



News, Opportunities & Events 

Check the OSDU website regularly for the latest debating news, opportunities and events in Ontario, including national qualification opportunities. Better yet, subscribe to the OSDU mailing list below and follow us on social media. Be the first to know about upcoming tournaments, learning opportunities and debate workshops so you don't miss out!

OSDU's 2018 Junior Provincial Championship tournament information has been posted

The invitation for the OSDU's 2018 Junior Provincial Championship tournament has been posted. Click here for more information. 

Upcoming events: 


Follow OSDU on social media: 

Twitter - @OSDUdebating
Instagram - OSDUDebating
Facebook - Ontario Student Debating Union