Here is a podcast I recorded for the VBM (KMTT). It examines the place of Tumah and Tahara in Sefer Vayikra.
And here is a (written) shiur for this week:
The (written) shiur deals with the THREE areas of our lives which are affected by Tzaraat: Body , Clothing, and Home. Interestingly, these represent three "membranes" three outer layers that protect and insulate us from our wider environment. Our skin, our clothing, our houses, all are seperating layers between ourselves and others. The shiur examines the unique textures of each of these different shells of our lives. And how Tzaraat works as a corrective stimulus when the system goes wrong.