Such as what color the walls will be, what a pattern will be used, what material the floors will be made of, what the color will be.

However, there is another important area that is overlooked or not given enough importance, which is actually the doors that are an indispensable part of our homes.

If enough attention is paid to both the entrance door and the interior doors of the house, the integrity of our house will be ensured and a quality appearance will be achieved.

From wrangling a group of second-grade kids into assigned desks to making multiplication tables or long division "fun" for the day, a teacher tackles the duty with nuance and patience—all while somehow turning a bare cement box of a room into a colorful, happy center for learning complete with decorated walls, desks, bulletin boards, and even doors.

On a budget. (That's an A+ in our book.)Since teachers are typically an over-achieving bunch, why not start early? A creative design for your door is just the thing to welcome your students back to the classroom this year.

We've rounded up 15 classroom door decoration ideas that will kick off the school year in style.