As a 17-year-old, and having just completed two junior years, I was very interested in Bennett's and Garfield's opinions.
My first year as a junior was as an American Field Service foreign exchange student in Australia. I was very impressed by their grading system and the manner in which exams and classes were conducted. Upon returning to the United States, I was appalled by the school system and the even rudimentary level of "honors" classes at my U.S. high school.
Instead of having the only five grading levels as they do here (A, B, C, D, Fail), my Australian school separated all of the students on a scale from 0 to 100. This enabled the colleges to easily determine acceptance from the applicants. Here, a second and third criteria (scholastic and aptitude tests) are needed.
In my Australian classes, the teacher would lecture and answer questions most of the period, and at home we would study from our notes and texts, even if nothing was assigned. Here I found that most students feel that doing assigned homework is enough studying.