Parenthesized names following items indicate the preson who brought the link to my attention. Anneke Bart and Mike May have collected some resources for teaching teacher. Mostly geometry stuff. Anneke Bart's teaching materials . Worksheets are in postscript and pdf formats.
Materials are available in postscript, pdf, and laTeX source.
They provide good suggestions for what to do, and have some curriculum materials available. Supplemental Instruction materials. Another source of good ideas. See the SI Leader training manual, for example. Avalaible as PDF file .