A problem-solving rubric was developed to assess the ability of pharmacy students ' to prioritize , organize , and defend the best and alternative options on TBL cases The study involved 3 groups of pharmacy students : second-year students in a cardiology class who received no feedback ( control group ) , third-year students in an endocrinology class who received written feedback only , and third-year students in an endocrinology class who received written and verbal feedback .