Despite my 15 years of experience with portfolio assessment, its power never ceases to amaze me. I’ve recently conducted a course for public school English teachers in the Federal District and, once again, used portfolio assessment. I have a feeling that some educators might not adopt portfolio assessment because they think it is too complicated; others might think it is not “serious” or “valid” and “reliable” enough, and that anything goes. I’m going to demonstrate how portfolio assessment is simple, valid, and reliable as a classroom assessment tool. More importantly,...