In this epistolary follow-up to the best-selling First Day Jitters and Last Day Blues, Mrs. Hartwell receives letters over the course of one school year from just about everyone. As every first-year teacher knows, a classroom full of second graders can be alarmingly unpredictable.The letters the children write to Mrs. Hartwell are sympathetic ("I figured you might be a little scared, just like me"); informative ("...most kids...