It was not so long ago that parents had to wait until the end of the semester to have a one-on-one conversation with their child’s teacher.

But thanks to the many forms of communication we have at our fingertips, that conversation can be instantaneous.

“Many school districts require teachers to be in email contact with parents,” said Dr. Jill Stamm, a child development expert with the Arizona’s Children Association.

Parents say it can be confusing, that parent-teacher etiquette. For example, should you friend your child’s teachers on social media?

“I wouldn't until the teacher asked me to," Stamm advised. "You wouldn't go barging into someone’s classroom without being invited so don’t go barging into someone’s space, their mental space."

There are other back to school etiquette questions.

Some schools have rules against phones in class, but is it even smart to check in with your child in the middle of the school day if that's allowed?

“Absolutely not," Stamm said. "Kids depend on seeing their parents as being stable but when they see in their parents as hyper-vigilant it causes them to be hyper-vigilant, and that’s what leads to anxiety."

How about TMI -- too much information? When is okay to provide teachers with details about your and your child’s private lives?

"The death of a close family member, a divorce, substance abuse,” Stamm said.

Circumstances that your child could internalize, affecting their emotional state at school – or even their health -- are times when it's wise to provide private information.

If your child is being bullied, that’s also a reason to contact a teacher.