I have a few kids in my preschool who cannot transition with a group. They can do this independently to an extent, but when other kids are with them, everything falls apart. They run around the room, tackle kids, throw toys and just cannot keep themselves contained and focused. I have tried many paths, like delaying their transition until I can assist them, but I am met with defiance and aggression. I have also tried visual cues, verbal cues and other audio cues. I spend time with them during the day in an attempt to gain a positive relationship and trust with them, but nothing is working. I am flexible with needs, but I also have strong expectations of all my kids' behaviors. Does anyone have any advice?