The labs focus on technology. They enable you to focus on details and actually build systems. Labs are meant to be learning instruments, not assessment tools.
The lectures focus on concepts, standards, and the big-picture. Certain technological details are also covered to demonstrate complex ideas or to compare and contrast implementations.
Some lectures will include pop quizzes, hands-on challenges in the teaching lab and/or games. These active-learning activities are intended for uncovering fallacies and avoiding pitfalls.
The lecture notes (linked to from the Calendar) include assigned readings from the textbook and from selected articles. These are integral parts of the learning experience of this course.
You are strongly encouraged to contribute to this group. By simply framing an issue into a question, you help sharpen the learning focus for yourself and for others. And by answering a question or engaging in a discussion, you sharpen your ability to make/defend a point or critique one.