As a teacher, remember the student with OI may have extended absences from school, or may have periods where they are in pain or receiving therapy or medical input and so may not be able to fully focus on their classwork. Prepare for this in advance, and prioritise the learning so materials can be easily transferred to another setting and parents or other staff briefed on where the student is up to. This will help them ease back into the class routine when they are able to.
Be prepared for a fracture occurring at school, and ensure that other students are aware that if a fracture happens it is not anyone's fault - it is something that happens from time to time with students who have OI. Some young people could feel quite devastated that something they have done may have caused a fracture in another person, and they may need to be supported and counselled through this situation if it happens. Plan ahead as a school so that you can quickly and easily put an emergency plan into place to deal with a fracture at school. This will minimise distress to the student with OI and other students and will ensure the student can be transferred easily and comfortably to medical care.
Remember that students with mild osteogenesis imperfecta may not always be diagnosed, and that the way their condition presents may be quite different to another student with the same type of OI. Don't be afraid to seek out further information about OI when you need it.