Realize that all teachers and classroom situations are not the same. What may work with one teacher or school may not be effective with another. Remember that the main purpose of a student in school is to learn, not to witness. However, students should remain open to the leading of the Holy Spirit. There are many exciting stories about how students provided the questions and information that eventually produced major changes in teachers' lives.
Prayer is the most important ingredient in any human endeavor.
Be sure that classroom efforts are founded upon time spent in prayer. Take advantage of this opportunity to pray with your child concerning their Christian walk, attitudes and faithfulness.