Check with your district. Your child can also continue to make friends outside of school. Groups also has chat rooms for teens which are homeschooled, but, like any internet chats, parents should supervise the exchange of information. On this account, stop worrying. The educational publishers have done all the work for you, with extraordinary books and interesting information.
Grader Needs to Know.
Frankly, you can use my district's detailed objectives for each grade and get that information for free. Seriously, there are SO many sites, chat rooms, email discussion lists, and individual sites like mine that will donate their time and expertise to help you, that knowing WHAT to teach isn't going to be a problem for you. Ah, this one is more tricky. Many families are forced to homeschool based on their situation. Some of the adults involved may not have much patience, know HOW to teach, or have knowledge of the subjects they should teach their child.