2023 Washington Code 28A.415.430 – Professional learning — Defined — Scope

2022 Washington Code 28A.415.430 – Professional learning–Defined–Scope

2020 Washington Code 28A.415.430 – Professional learning — Defined — Scope

2019 Washington Code 28A.415.430 – Professional learning — Defined — Scope

2018 Washington Code 28A.415.430 – Professional learning — Defined — Scope