At my son’s public school, no freshmen would have time for that after doing the ordinary required classes and perhaps knocking off their arts requirement. (Standard is Eng 9 Honors, Bio Honors, AP World, Math Honors at whatever point they are, an arts elective, a foreign language at the right level, and there’s just one more space since gym is done. What would your kid be giving up?)
I don’t think it sounds “suspicious” whatever that might mean, but it does sound weird.