High School Search (Dallas)

Hai,
We are moving to Dallas in June. I have a 16yr old daughter doing her 11th grade here, in singapore (IB). Can anyone let me know some good IB schools in Irving. When i browse through the greatschools website, i get an idea. But are these rating correct? Currently i have Coppell high school, Trinity High school and North Hill prep school in mind. Please help...