Trendy teens are not the only ones searching for the hippest back-to-school hairstyles these days. Teachers are too! So before the bell rings, we are sharing our expert tips for our hardworking teachers who want the smartest, no-fuss hairdo's -- guaranteed to earn you an A+ in and out of the classroom.

The first lesson to remember is that being a role model doesn't mean you have to be boring!

"No matter how old you are, always keep your hairstyle new and fresh," says celebrity stylist Anthony Linzalone from New York's Pierre Michel Salon. "Don't stay stuck in an era. You don't want your kids stuck in an era and you don't want to be remembered as stuck in an era."

Today, teachers can rock a chic 'do while still keeping it simple to style on those early weekday mornings. Take a look at Linzalone's favorite classroom looks for every length:

Short Hair -- The trend right now is for easy-to-maintain bobs (a.k.a. this season's "Flapper Bobs") that are razored at the bottom and worn soft and flattering around the neck. These haircuts fall beautifully and look very professional and extremely stylish. They can be worn with bangs, a slight angle or a long layer for movement.

Shoulder Length Hair -- Cuts should be blunt and crisp for a trendy, yet sophisticated look. Make sure to trim at least every six weeks so it stays fresh and bouncy. You can wear it neat like Naomi Watts or slightly tousled like Julia Louis-Dreyfus and Scarlett Johansson. If your hair is naturally wavy, toss aside the flat-iron and embrace those curls by wearing hair loose, yet tucked away from your face.

Long Hair -- Longer locks should not be worn down because it doesn't look as professional (plus it's too easy for little sticky fingers to pull on it!). Instead, try a loose pony tail with a soft fringe to keep it current or fashion's newest twisted braid. Any accessory should be simple -- like a slim hairband, bobby pins or small clips. No bright or bling-bling hair accessories needed.

If you don't have time to wash your hair before the bell rings, Linzalone says don't panic. "Less is more. "Don't over work it," he says. You can refresh your bedhead hair by spritzing it with a spray gel and then blow-drying it upside down for a couple of minutes. Or, try a dry shampoo -- like Rene Furterer Naturia Dry Shampoo -- to refresh your roots without the lather-rinse-and-repeat routine.

Know what else is great for back-to-school besides terrific looking tresses? These must-have pieces for your Fall wardrobe!