Clearly, as I have suggested earlier in this book, the first day of the school year is one of the most important. This day sets the stage for all that is to follow. Students leave each teacher’s classroom on that first day having already formed an opinion of the course and the instructor that is unlikely to change dramatically one way or the other in subsequent days. The final days of the school year are similarly important. Students can leave for the summer with a good feeling about what they have learned and accomplished, or they can leave with a sour taste for what has occurred, perhaps only because of a negative incident or two right at the end of the year. Such incidents can erase many more positive ones that happened regularly earlier on.