relative to the definition of the term "evidence-based" within public education.

HB 129 defines "evidence-based" for public education methods to require that teaching approaches, training, and policies must be supported by reproducible scientific studies across multiple disciplines or well-designed experiments within a single discipline - excluding surveys or subjective data. It directly affects all New Hampshire public school districts and the Department of Education, mandating they use this definition in all communications and publicly disclose the scientific studies supporting their methods. The bill requires districts to review existing practices and adopt new evidence-based methods, with the Department of Education needing to hire a consultant to implement the changes (estimated cost: $118,000 annually starting in 2026). Local districts will also face administrative costs for reviewing and updating curricula and training, though exact impacts vary by district. The law takes effect 60 days after passage.