Clementine's Letter Author:Sara Pennypacker, Marla Frazee FOR USE IN SCHOOLS AND LIBRARIES ONLY. When her favorite teacher goes on an extended research trip to Egypt and leaves a strict substitute teacher behind in his place, Clementine isn't sure whether she should be selfish and put her sneaky plan in motion to coax Mr. D'Matz back to school or leave him be to enjoy his special adventure.