Screencasts are digital recordings of the output from a computer monitor, including narration. Their use was piloted in five chemical engineering courses and the feedback from students was overwhelmingly positive. The screencasts were produced on Tablet PCs using Camtasia Studio software and were posted to the Blackboard classroom management system for easy student access. The screencasts showed example problems, offered mini-lectures on important topics, clarified questions on homework assignments, explained how to use software, and described concepts in more detail than class time allowed. Students found them to be effective supplements to class time and textbooks, and instructors appreciated their easy preparation.