Take all the plans that have been developed at your school and put them together or compile them into one plan that meets the needs of all the children at your school. You could also have the key stakeholders in your school and community participate in strategic planning. Remember that your school vision must be shared by the majority of persons at your school or that vision may just be your personal hallucination. Develop the reasons why funding would be necessary, or understand the discrepancies. These become the problems that need to be addressed in your program.
Discrepancies come from lack of time, training and knowledge, etc.
This is not the place to find fault with the persons with whom you will be working when your grant is funded. Develop the activities, objectives, evaluation, timeline, budget and key personnel. Once you have developed your funding source and established that your needs meet the funder's criteria, the rest of the proposal development is clear sailing. The funder should be able to see a tight tie between all those components. Remember not to establish a need in your program for which you do not intend to create a solution .