K–12 professional development is moving from basic AI uses—lesson templates and administrative automation—to training teachers to build and supervise agentic AI tools that perform complex, multi‑step instructional tasks. The National Academy for AI Instruction, backed by the American Federation of Teachers and major AI firms, is training educators to use AI for curriculum design, formative assessment and adaptive supports while preserving teacher judgment. District leaders and teacher unions emphasize that meaningful AI adoption requires sustained professional development so teachers can integrate tools responsibly and retain control over pedagogy and assessment.