depends on what you are doing, for existence if you were working with chemicals, it’s important for you to wear safety goggles & to not touch your skin when doing things like that. After you wash your hands, you may touch your skin because if you don’t, it could ruin your skin. Or if you were working with dissecting something, it’s important to know what you’re doing & to wear gloves & whatnot. But importantly, LISTEN TO YOUR TEACHER BECAUSE SHE IS RIGHT & KNOW THE DANGERS OF WHATEVER YOU ARE DOING & NOT PLAY AROUND WHEN DOING IT!