Are those phrases not interchangeable in Canada?

Saying “# grade” might be more common where I am in the US, but no one would bat an eye if you said “grade #” because that is used commonly enough as well that people are used to it.

I started watching TNG just recently and am nearly done with season 2. Season 1 is not nearly as bad as the internet led me to believe, and honestly I kinda miss some things from it a little bit.