Just google it, dear.

Type in “6th grade homeschool english curriculum”, the hit “go”

or try “jr. high and high school level homeschool curriculum” and then hit “go”

TONS of stuff out there.

You can even search for used curriculum the same way.

As for online textbook sellers:

Amazon has new and used textbooks and workbooks (listed in childrens educational), and they’re usually fairly well reviewed:

http://www.amazon.com/

The BackPack has new and used individual books as well as full curriculum:

http://www.thebackpack.com/

Textbook Heaven has new and used books also, and a few homeschool packages:

http://www.textbookheaven.com/

There are tons more sellers out there of pre-packaged curriculum, schoolbooks, and individual subjects. If you start with a list of your likes, dislikes, and needs it will be a lot less overwhelming. Good luck to you!

I also did a search for homeschool textbooks and found a myriad of websites that should help you get started.

http://www.rainbowresource.com

http://www.homeschooldiscount.com

http://www.aophomeschool.com

http://www.abeka.com

http://www.christianbook.com

Also for math look at

http://www.teachingtextbooks.com