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Take good care of your personal hygiene. Style your hair each day. Wear clean clothes that fit well. Add trendy accessories to your outfit. Wear light makeup if you wear any.
If you want to be cool be in middle school, you have to pay attention to how you look—and smell. To make sure you're always fresh and clean, brush your teeth and wash your face every morning and night, shower or bathe every day, and put on a combination antiperspirant and deodorant after you get out of the bath.  An antiperspirant helps reduce how much you sweat, while a deodorant helps prevent body odors from forming.  Shampoo your hair every 2-3 days, or more often if it starts to look oily between washes. In addition to brushing twice a day, you should also floss your teeth every night to remove plaque that can lead to problems like bad breath or cavities. Having a great hairstyle instantly makes you look cooler, but looking nice usually takes at least a little work. Every morning when you're getting ready, spend a few minutes taking care of your hair. Depending on your style, that might just mean combing your hair or smoothing it out with your fingers, or it might mean wearing your hair up or adding hair accessories.  You can use styling products like gel, mousse, or salt spray to help you style your hair, but remember to only use a little bit of product or your hair will look wet and greasy. If you have a hair straightener or a curling iron, you can use these tools to style your hair each day. However, heat can be very damaging to your hair, so it's best to wear your hair in its natural texture at least some of the time. When you get your hair cut or trimmed, ask your stylist to help you find a hairstyle that will suit your face. If you're not sure how to style your new cut, ask the stylist to show you before you leave! Whether you have to wear a uniform or you can wear your own clothes to school, if you want to be cool, you should wear clothes that are clean and free of wrinkles. Also, for the most flattering fit, choose clothes that skim loosely across your body without being too tight or too baggy.  Dirty clothes can smell bad, and wrinkles will make you look sloppy. If you can wear your own clothes to school, keep it casual most days by wearing jeans or shorts and a T-shirt. In cool weather, add a hoodie or a sweater to keep warm. If you want to dress up, like if you have to give a presentation in front of your class, try wearing khaki pants and a button-down or collared shirt. If you have a more feminine style, you might wear a dress, instead. Accessories are an easy way to make an outfit cooler. When you're shopping for clothing, check out the accessories as well, and look for pieces that you feel reflect your personality. Then when you get dressed every day, pick 1 or 2 accessories that match what you're wearing.  Try adding a canvas belt and cool sneakers to make jeans and a T-shirt look more interesting. If you wear a uniform, you might show your style with a stylish bracelet, watch, necklace, scarf, colorful socks, or a fun belt. Just make sure it follows your school's dress code! Look at your favorite celebrities and style icons for outfit and accessory ideas. A lot of kids start experimenting with makeup in middle school for the very first time. You can use concealer, powder, and blush to smooth out or brighten your complexion. If you want to define your eyes, lightly line your eyes with eyeliner and apply a little eyeshadow to your eyelids. Then, try a light coat of mascara on your lashes.  As  you're experimenting with makeup, keep in mind that usually, the more natural you look, the better. If you look like you're trying too hard to change your appearance, you might seem like you're not self-confident. Remember, if you want other people to think you're cool, first, they have to believe that YOU think you're cool!