This document summarizes a presentation about introducing screencasts to support first year students learning computer networking concepts using simulation software. The presenter created short instructional videos demonstrating tasks in the software based on constructivist learning principles. Students provided feedback that the screencasts were helpful as they could pause, replay, and learn at their own pace. Assessment results improved but other factors could have contributed. Students liked the convenience and trusted source of instruction that screencasts provided. The presenter plans to create more advanced screencasts and workshops to share the approach with other lecturers.