It's nearly back-to-school time, so social finance site WalletHub put together a list of the best and worst school systems in America.

They studied the quality of education in the 50 states (plus D.C.) by analyzing 12 factors — "from student-teacher ratios and dropout rates to test scores and bullying incident rates."

Their interactive map shows each state's overall rank; with red representing the worst overall school systems, and green the best.