NO, don't do it. A reputable agency will not ask you to take their classes, have their photographer take your pics which means you pay $$$ If you pay to take the classes, so be it... she'll just learn some poise but don't expect her to be the next super model. Those places prey on people.
You NEVER EVER pay money. I have modeled most of my life. It can be very rewarding but it is also very hard. You have to take rejection well. Lots of waiting around, lost time that you might prefer to be doing elsewhere.
My daughter also models. She was "spotted" at the mall and given rave reviews, blah blah. Ended up.. they wanted her to participate in a show which was going to be about $1000 out of my pocket. Fortunately, I knew that game because I've been in the business long enough.
Reputable agencies don't require professional shots from day 1. A snapshot of full length ( your shots, not pro) and a close up face smiling. Just submit them to a good agency. Dallas area is Kim Dawson, Campbell just to name 2.