Final answer:
The principal should address the teacher comment about inadequate support for students needing special academic assistance.
Step-by-step explanation:
The highest priority for the principal to address would be the teacher comment stating, "With the need to teach combination grade level classes, I'm often unable to provide adequate support to a number of students who need special academic assistance."
Combination grade level classes can present a challenge for teachers in meeting the individual needs of students. In this case, students requiring special academic assistance may not be receiving the necessary support due to the limitations of the combined class. It is crucial for the principal to take action to ensure that these students receive the necessary support to thrive academically.