Grandmère mentions that Julian was expelled from Beecher Prep as a consequence of his bullying Auggie in Wonder (2017). However, in that film, Julian was never expelled from Beecher Prep for bullying Auggie. He received a two-day suspension and upon hearing this, his parents decided to pull him out of the school at the conclusion of that school year.
When Sarah is running through the woods there is no snow on the ground. When the show the soldiers in the trucks by the road, the ground and the forest is covered in snow.