This is a great visual lesson on 6th grade Integers and Absolute Values unit. I've used this in my own classroom (but please ignore the chapter number).
The lesson consist of definition of integers, illustration of number line, positive and negative integers, definition of absolute value, and illustration of absolute value on a number line. There are also great "real world" examples for students, as well as guided practice for students at the end of the powerpoint. The look of the presentation was made colorful and cheerful so that it'd be more engaging for my 6th graders.