One approach used by many people is to add a section to their resumes called "Community Service" or "Volunteer Work." They list the highlights of their volunteering here, to show that they have interests outside of their employment history already described. This is certainly better than ignoring volunteer experience on a resume, but it is not the best way to highlight what you have learned as a volunteer.
You can now earn course credit while volunteering in Guatemala, Peru Cusco, and Costa Rica with International Volunteer HQ! It’s a WIN-WIN-WIN-WIN! - volunteer abroad affordably, learn a new language, add volunteer experience on your resume and gain university credit! IVHQ is excited to announce that our volunteer abroad programs located in Guatemala, Peru - Cusco, and Costa Rica now offer course credit to volunteers who are seeking to fulfil a language requirement for their educational institution.
Volunteer Experience on Your Resume 5-5