Rick VanDeWeghe writes of modeling: "teachers show how they go about the processes of reading and writing-drawing students' attention to the ways readers and writers think and the real decisions they make, especially when they themselves are challenged." In her book Conversations , Regie Routman explains why this modeling process is so successful: "It has always been our job to teach directly and explicitly in response to students' needs-carefully demonstrating, specifically showing how, clearly explaining. Whatever we want our students to do well, we first have to show them how. Of all the changes I have made in my teaching, adding explicit demonstration to everything I teach has been the single most important factor in increasing students' literacy" (24).
Although this sentence has a contrast transition , the criteria for contrasting are not the same. The criteria used for Aaron are height (tall) and strength (strong). We would expect similar criteria to be used for Bruce (maybe he is short and weak), but instead we have new criteria, namely appearance (handsome) and intelligence (intelligent). This is a common mistake for students when writing this type of paragraph or essay. Compare the following, which has much clearer criteria (contrast structure words shown in bold).