I would like to read the stories about the other families in the book. Are there divorced parents? Are there kids whose mom or dad is in prison for making meth? (don't these kids "deserve" to have his family depicted in books at school?
What percentage of the families have a mommy and a daddy who are married and living together and taking their kids to school?
I'll bet none of the families have Dads wearing yamulkes or clerical collars.
I'll be you're right. No moms in long dresses and head coverings, either. Maybe there are no Orthodox Jewish or fundamentalist Christian children in the school, so the curriculum doesn't have to be "inclusive" for them.