The role: The first place to spot trouble is in the home, whether that trouble is substance abuse, slipping grades or a child who sleeps too much. Adults at home — parents, siblings, other relatives — are often the first to notice something going on.

The reality: Many families do not know what to look for. Sometimes a serious problem can be overlooked as "just a phase." But it's those sudden changes — angry outbursts, declining grades, changes in sleeping or eating — that can signal problems. When something unusual crops up, families can keep in close touch with the school.
The teacher

The role: During the week, many students see their teachers even more than their own families. Teachers are in a prime spot to notice changes in behavior. They read essays, see how students relate with other kids and notice when they aren't paying attention.

The reality: Teachers already have a ton on their plates. They're pressured to get test scores up, on top of preparing lessons and grading assignments. Plus, many teachers receive minimal training in mental health issues. But when they do see something concerning, they can raise a flag.