How is Child Find handled for home school students re special ed evaluations?

It depends on your state. Regardless of the state, you have the right to request an evaluation by the school if there is a clear need. The child will be tested like a public school child. But I believe YOU have to request the evaluation. About half the states can deny services to homeschooled children who have been identified as having a disability. Check out the site specialneedshomeschooling.com