Ms. Marple does not care about the education of the students. She only cares that those students butts are in her chairs and not at home. The Federal government doles out education funds based on two things, the number of students in a school and the number of students on the school lunch program. They want all students on the school lunch program regardless of need because certain funds are predicated on that. The more students that are home schooled the less dough the public schools get from the federal government for both programs.
The example emails above are great, but I think I’d include some of your challenge to her as well.
Demand some evidential reason for her position,
state that commonly available studies show the contrary of her position,
then ask her if her motives are as you stated - based on federal funding, ie, she’s greedy.
From what I heard our school district counts homeschoolers in the student population so they get the almighty bucks without having to deal with the student or spending a dime on them.