The moon will be nice and bright early in the evening during this phase. Young students will have a satisfying experience without having to stay up late. Local newspapers often have a moon phase schedule. A call to an astronomy club, science center or many online sources will get you the lunar schedule. Contact your local science center, astronomy club or local college for amateur astronomers with telescope to share with your school and students.
Many amateur astronomers love to come to schools with their telescopes.
Give plenty of advance lead time when requesting amateur astronomer volunteers - several months ahead is best. They are in much demand by schools, and volunteer their precious spare time. Plan to have one or two telescopes for a school group less than 30 or so. It is nice to have a variety of telescopes to show different views. And be sure to instruct your students not to touch the telescopes unless the owner gives permission.