Which thesis statement on the benefits of volunteering is most effective? schools should encourage volunteering because it reduces stress, promotes personal growth, and has a positive effect on society. although more than 25 percent of teenagers are likely to volunteer, we need more. so, schools need to encourage volunteering for all students. we need more volunteers from schools and colleges because the nation has far fewer volunteers than we need in these troubled times. there are a lot of reasons for middle school students to volunteer. i hope to illustrate a few of them in this paper. you may pick the one that appeals the most to you.