How to prep for BC Calc

I’m starting to use Khan Academy but unsure how helpful it is or how much it sticks to the actual course. Can anyone recommend online resources I can use? What are some foundation skills that I should try learning over the summer?

Keep in mind I am coming from Honors Pre-calc. There’s a lot of stuff I don’t know.

Does your school give work over the summer to prepare for AP Classes?

If not here is what one school does for Calc AB and Calc BC summer assignments:

https://www.middletownk12.org/site/handlers/filedownload.ashx?moduleinstanceid=6236&dataid=14779&FileName=AP%20Calc%20Summer%20Assignment%202017%202.pdf

https://www.middletownk12.org/site/handlers/filedownload.ashx?moduleinstanceid=6236&dataid=14778&FileName=AP%20Calc%20BC%202017%20summer%20packet.pdf

https://www.khanacademy.org/math/ap-calculus-bc seems to be useful