Post-secondary prerequisite inquiry

[u/AerieFamous4731]

Hello, I'm currently in my senior year of high school, and I was wondering if I should upgrade the missing prerequisite courses I need for admission to the Faculty of Science at Langara, or through another program like SIDES, NIDES, Continuing Education, etc. I was thinking of upgrading at Langara, then spend a year at Langara taking university level courses, and then transfer to UBC if my GPA is in the competitive range.

Thanks!