Leg rides are great for girls, because we don't always have the upper body strength we need, but I've personally found it more difficult for girls to use leg rides against other girls, simply because with a little flexibility, one can bridge up fairly high and spin in toward your opponent for a reversal and almost guarenteed back points. I wouldn't let that discourage you from teaching a leg ride though, for the most part, it's a great move in conjunction with a cross body ride and a power-half.
Sweeps are great against both genders of competitors. The idea of getting sprawled on or stuck under your opponent is almost eliminated with a good sweep.
The coaches who have impacted my wrestling career the most have treated me just the same as the boys, giving me no special treatment, but also realize that many moves that work for the guys have to be slightly modified to fit my strengths. Get to know what your girls can do (Flexibily, leg strength, good balance, perhaps a specific move or series, etc.) and try to cater moves to her style.