Although librarians have carefully compiled these sources, there is no substitute for your own evaluation. Use the following guides to help you.
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To avoid searching through endless unreliable websites, improve your google searches from the start.
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Also include words like disseration, thesis, or pdf to bring up more reliable documents.
Try Legalization of Marijuana pdf site:.gc.ca
From the website Critical Thinkers Academy, an example of how to develop your ideas. The topic considered: "Should Teachers be allowed to ban laptops in the classroom?"