I also work in the schools. We primarily use a consultative model too. I found the book The Consulting Therapist to be very helpful with my transition into the school.
We have 6 OTRs and 1 COTA. Our caseloads range from 45-75 students with numbers constantly growing. Many students on our caseloads are only seen 30 min/month allowing 1-2 quick visits to the classroom. I try to collaborate with my special education teachers weekly. That is the goal, not the reality. Meetings, evaluations and various other committments require me to change my schedule daily.
While I can see the benefit to direct service, I struggle with pulling a child from class. I feel like they need to be in the class to learn and it takes them so much more effort to catch up when class time is lost.
I use my own model for treatment... I treat the school first (what does the prinicpal and counselor need, is the curriculum meeting the schools needs, is the cafeteria a sensory nightmare), the teacher next (how can she better meet the needs of all of her students, what exercises can she work into her day that helps my student and the entire class, can I support her by providing website resources or school resources) then I treat the child (what does this child need, how can that fit into his/her day, do the parents want info/exercises/to be involved)
I'd love to hear how others are working in the schools. I've been in schools for 3 years (an OT for 10).