I taught through the book of Isaiah through Precept Upon Precept last year. Below are some of the links to the video recordings of the lessons.
A PUP study of the book of Isaiah
Lesson One, chapters 1-2 : http://vimeo.com/19127905
Lesson Two, chapters 3-5: http://vimeo.com/19579197
Lesson Three, chapters 6: http://vimeo.com/19733802
Lesson Four, chapters 7 – 9:7: http://vimeo.com/20084246
Lesson Five, chapters 9:8 – 12: http://vimeo.com/20541482
Lesson Six, chapters 13 – 14:27: http://vimeo.com/21097751
Lesson Seven, chapters 14:28-18: http://vimeo.com/21452855
Lesson Eight, chapters 19 – 23: http://vimeo.com/21594995
Lesson Nine, chapters 24 – 25: http://vimeo.com/21953786