You're welcome! Depending on where you live, some of the CRS/umbrella schools have optional classes, sports, and other activities. We haven't gone that route - HomeLife is 3-4 hours drive from home, so we just do all our reporting, etc. online. Our girls take a few classes at the community college during high school instead, plus music, dance, community theatre, etc. for their arts and electives.
As for testing, HomeLife doesn't require it at all, so we just do the PSAT/ACT/SAT in high school. Some other CRSs require testing every year or two, and some also have extra courses required for graduation (beyond State requirements) and want more say in your choice of curriculum. There's really quite a broad range; I think the TN Home Ed site might have a listing of different CRSs and how they operate.