Why is the Course I Chose Highlighted in Red?

Go to https://myblueprint.ca/ and log in using your TDSB email and password (Please make sure you don’t put your private email) 

See also: How to Log In to myBlueprint 

Go to the red highlighted course and hover over the bright red exclamation point in the bottom right corner of the box. 

A pop-up will appear stating the issue with the selected course on the top. This course requires you to have the prerequisite first.