This document outlines the SPIDERfit approach to developing physical literacy in youth. It discusses building physical literacy through a developmental system called SPIDER F.A.S.T., which focuses on foundational motor abilities, fundamental movement skills, coordination elements training, complex movement skills, and specialized training. It also covers topics like perceptual-motor skills, coordination windows, teaching techniques, and programming a physical literacy lesson. The overall goal is to empower youth to become happy, healthy, and active adults through physical literacy.