Per diem staff members are often in and out without time to really discuss and plan. We have quite a few therapists who have left for another job with a more appealing salary only to return after a year or less. Children with CP or more severe difficulties tend to get weekly therapy. OTs consult to teachers, who are with the children weekly or biweekly. ST's and PT's also work in this manner.
Parents help develop goals, and are always present in team meetings involving their child.
Phone contact is frequent. When in preschools children are often seen in groups, or the classroom is consulted as a whole. The OT's organize a sensory activity, an obstacle course, an art activity, or assist in snack, depending on the needs of the children involved. If consultation is not provided to the teacher as well, the services are a lot less useful. I hope this is helpful to you.