There is no legitimate justification for such an expectation. Charles provided guidance that school committees MAY use. The guidance in Charles is reiterated in Brunelle. Some superintendents choose the route of minimal oversight. Such a route can be justified by the fact that there is no evidence or indication that more stringent district oversight results in greater progress for home educated students.
Parental commitment is the most important single factor in student educational progress.
Homeschool parents clearly have such involvement, and their involvement exists independently of any district oversight. See research by Brian Ray 4. Guidance about subjects taught. Charles lists the subjects that are required in G. L. c. 71 1. The General Laws require training in these subjects over the course of the child's education.