She was charged with:
140. (1) When a pedestrian is crossing on the roadway within a pedestrian crossover, the driver of a vehicle approaching the crossover,
(a) shall stop before entering the crossover;
So a crossover defined under the HTA is defined here (https://www.ontario.ca/laws/regulation/150402#BK0). Most likely, it was a 4 way stop which is a crosswalk, not a crossover, therefore it would be pretty easy to get the charge dropped. Like JSherk Recommended, take photos using the proper format to admit them into court (I can't remember the topic off hand, but a search of this forum would bring it up) as soon as possible. Plead Not Guilty, Request a trial with an officer present, and once you get a trial date, request your disclosure. Ticket Combat has a nice template for a disclosure request.
If this does go to trial, remember, you do not need to go on the stand to testify (better to do this so you don't incriminate yourself). Print off 3 copies of the section your daughter was charged under, and make sure the officer defines the crosswalk as a cross walk, not a cross over. If he testifies it was a crossover you have the pictures proving otherwise. Following him saying it is a crosswalk, then you can ask for a motion of non-suit since the act defines a crossover, not a crosswalk. Case should be dismissed, and if not, it has great grounds for an appeal.