Each school district shall consider and, if the school district board of education deems it appropriate, adopt a policy to encourage students to engage in community service or service-learning and to recognize students' contributions to their communities through community service or service-learning. Pursuant to the policy, a student who successfully meets the community service or service-learning program goals, as specified in the policy, may earn recognition in the manner described in the policy. The policy should specify the manner in which recognition of service may be reflected on a student's diploma or transcript as an indication of the student's commitment to service within the community.