>I definitely agree with your thoughts that flow-proofs are far more >appropriate for allowing students to justify their thinking and >reasoning. I have used flow proofing since my second year as a geometry >teacher and am constantly amzed at the difference in understanding >students are able to achieve through the use of flow-proofs rather than >two-column proofs. It's a pity more geometry teachers don't investigate >this as a valid means of teaching students to reason. >
I blushingly admit that I know nothing about flow proofing. I would appreciate a short tutorial or an accessible reference.