Fall is still a very large portion of your daughter's life away. Huge changes will be happening between now and then, and "getting" the point of pottying could well be one of them. Meanwhile, if you are feeling tense about her seeming lack of progress, she could pick up on that and become tense herself.
My grandson did fabulously well with role-playing parties with his stuffed animals. They'd line up by the toilet, eagerly jostle each other to get their turn, happily sit and "void" (I'd sometimes simulate this by pouring a small amount of water in the potty), and give each other high 5's when done.
Another trick that can sometimes stimulate the bladder to release is to let the child splash fingers in a small bowl of water or let the child hear running water (because I'm conservation-conscious, I'd do this by repeatedly pouring a cup of water into a bowl rather than let the tap run).
Keep all your potty messages upbeat and encouraging, and I'll bet she'll get there pretty soon. You might also allow her to watch/listen to you using the potty if you don't already do that.
I'd also like to warn against making TOO big a deal out of a successful event. An over-the-top parental reaction can distract a child from connecting thoughtfully and personally with what just happened. A quieter comment and perhaps a small reward is all that is needed for many kids. You want to be sure she knows this is HER success, not yours.
Here's one more informative website you might find helpful. It gives a few variations on"readiness" checklists, plus tips on various training strategies, the best ages to start them, and the advantages and disadvantages of each approach: http://www.parentingscience.com/toilet-training-readiness...