We are aware of no requirement for you to offer this information unsolicited. If you are asked by a school official, you must give an indication that the child is being home educated. School boards have the power to conduct a census in their jurisdictions in order to determine that every child is being educated. Definitely mention the core subjects -math, language arts, science, etc. Have someone help you write the letter, if necessary.
Contact OFTP to have comments on it.
Show in your correspondence a positive attitude, confidence and successful approach being taken in your program. When school board officials have something to put in a file, they are more content. School boards get fearful when there is no contact. If a visit is demanded, arrange for one on neutral ground . Take the initiative.