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Comprehensive and Detailed Explanation:

In the Health Appraisal and Nursing Practice domain (Physical Health, Review of Systems, Acute and Chronic Conditions), the school nurse performs systematic assessment (subjective symptoms + objective data like weight trend and point-of-care glucose) and recognizes classic signs of new-onset type 1 diabetes (polyuria, polydipsia, polyphagia/weight loss, fatigue, hyperglycemia). Prompt referral for medical confirmation (e.g., lab testing for hyperglycemia, ketones, HbA1c) is critical to prevent diabetic ketoacidosis. The nurse does not diagnose or initiate treatment independently but coordinates care, notifies the family, and prepares for school re-entry with updated orders, IHP, and EAP.

Option A delays necessary intervention. Option C exceeds scope of practice without provider orders and risks harm. Option D ignores the urgency of possible metabolic imbalance. This process supports academic success by addressing health barriers quickly, involves family-centered care, and leads to development of individualized plans per NASN standards. Certification objectives stress application of the nursing process in school settings, growth/development considerations (adolescents may present atypically), accurate documentation, and collaboration with providers and school teams for seamless transition and ongoing monitoring.