Have any of you all ever received a special education complaint concerning child find obligations for a student who is parentally enrolled in a virtual, private school?  If so, how did you approach the investigation?  Were there any resources that helped

Have any of you all ever received a special education complaint concerning child find obligations for a student who is parentally enrolled in a virtual, private school?  If so, how did you approach the investigation?  Were there any resources that helped you investigate/resolve the complaint?