The Physical Science Share‑a‑Thon is a collaborative K–12 session designed to bring together educators across grade levels to exchange high‑quality instructional resources, classroom strategies, and phenomenon‑based lesson ideas connected to Physical Science. From early‑elementary explorations of motion and energy to middle‑school investigations of forces and interactions, all the way to high‑school Physics and Chemistry concepts, this session creates a space where teachers can learn from one another and strengthen vertical alignment in Physical Science instruction. Throughout the session, participants will browse, share, and discuss ready‑to‑use activities, labs, demonstrations, digital tools, and scaffolds that support diverse learners. A key outcome of this Share‑a‑Thon is the creation of one unified repository of K–12 Physical Science resources—a living collection that educators can continue to access, adapt, and contribute to beyond the session. By the end of the Share‑a‑Thon, teachers will walk away with a curated set of classroom‑ready materials, fresh ideas for instruction, and a stronger professional network committed to improving Physical Science learning for all students.