I teach for a career college and have very little ability to personalize instruction materials (the slides, etc. were put together by someone else). I do my best to personalize my lectures but it is difficult to go over the same material without being able to personalize it. Consequently, I find it difficult to "recharge my batteries." This feeling is exacerbated by the fact that the courses are six weeks long, so I go through the same lectures regularly. I realize that my situation may be unique, but has anyone experienced this or have any tips for me to get my ire up once again?