I think that Flow Proofs make more sense because they connect ideas better than traditional two-column proofs.
Attached is a Word document that I use as the nucleus of a workshop introducing Flow Proofs. Some of the early examples are completed proofs. Some later problems will need your input to complete the logic.
Notes: Each Flow Proof is written from the bottom up: Givens at the bottom, conclusion at the top.
Bad News: you must get used to my handwriting in the document.