I think students should be able to eat in their classrooms. Sometimes they may miss breakfast, or they may just feel hungry during the class period. I don't think this should be a problem for peckish kids in the classroom. The reason, I think, that teachers don't allow students to eat in classrooms is for two reasons; students may not clean up afterwards, and/or they might let their munching interrupt their learning or the lesson. As long as students eat quietly and respectfully while maintaining focus on the lesson, and remember to clean up afterwards, I think they should be allowed to eat in the classroom.