71% of parents say kids experienced challenges last school year, survey shows. Here are the top stressors.

The beginning of the school year can be full of emotions, both good and bad — and a new national survey suggests how many kids are dealing with issues that cause their parents concern.

The survey, conducted online by The Harris Poll on behalf of the On Our Sleeves Movement for Children's Mental Health, found 71% of American parents say their children experienced challenges last school year. 

The top issues identified by parents included: