This IT Core: Module 3 – Software (Intro. Material) is a complete planning guide for teaching operating systems, software types, applications, file management, AI tools, and software troubleshooting in a CTE or Intro to IT course. Designed for 90‑minute block scheduling and a paper‑first, low‑tech classroom, it includes pacing, module overviews, alignment snapshots, and instructional guidance to support smooth implementation. Key IT vocabulary—operating system, GUI, CLI, system software, application software, file formats, naming conventions, versioning, cloud storage, AI productivity tools, and software troubleshooting—is clearly introduced to build strong foundational skills. Ideal for teachers seeking IT curriculum, CTE software unit planning, or ready‑to‑use digital literacy resources.