Hi I have many faculty I work with.....that struggle a bit to wrap their heads around TBL...when they have traditionally done lots of calculations...and had their students do lots of homework calculations. Larry gave me a bit of a clue....²make sure you ask students to make a decision based on the result of the calculation...so they can get very immediate and unambiguous feedback on the calculation answer²....that was helpful....but not completely satisfying Then I bumped into the book ³Ranking Exercises for Physics Students².....which had an AMAZING IDEA Get students to do a series of problems (see attached example) then rank order them most-least/highest-lowest/fastest-slowest....then the reporting is about comparing the rank order This has allsorts of advantages...since they get to do multiple calculations...on different problems....and they get such clear feedback on ALL their calculations Nice! Jim