M.M.
I pulled my daughter out the beginning of 5th and my son out the beginning of third. THey are now is 7th and 4th.
Go to hslda.org. I have heard that MI is more lenient than other states in regards to homeschooling rules. This is the site to get you started with the state.
In NC and VA you have to show your HS or college diploma. In NC I had to go through the state dept of non traditional schools. IN VA I had to notify the home district.
Keep your kids in sports Find a support group. Get them into the church youth groups, scouts, IWANAs, music lessons. Mine take art lessons through the park district geared towards homeschoolers.
THere are online math tests Singapore and Saxon both offer them.
I started both mine on Shurley Grammar, it is a very good fundamental grammar text.
Mine also do Singapore Math.
The Latin Road to English Grammar
Bob Jones Science
I have reading books they do for school, my 7th does Greek Myths right now and my 4th grader does Mrs Frisby.
There are total curriculums out there that I have heard great things about.
Bob Jones, Christian Light, Veritas Press, Classical Conversations.
You can do it.