Listed here are resources for you to use to find ways to travel inexpensively and purposefully. These exchanges will broaden your horizons and give you the opportunity to meet students and teachers from around the world:
Kennedy Lugar Youth Exchange with countries with significant Muslim populations: http://exchanges.state.gov/youth/programs/yes.html
Scholarship to study in Cambodia: http://www.asiapacificedcrossings.org/students/american-youth-leadership-program-with-cambodia/
NSLI-Y: Scholarships for exchanges in several countries: http://exchanges.state.gov/youth/programs/nsli.html
Study in Germany: http://www.usagermanyscholarship.org/
German student exchange: http://www.goethe.de/ins/us/lp/prj/gapp/enindex.htm?wt_sc=gapp
International Programs- Many listed- Youth leadership toward the bottom are short term and most are covered by scholarships: http://exchanges.state.gov/youth/programs/ylp/current-youth-leaderships-programs.html
Global Potential- Low cost world travel with community service component: http://global-potential.org/home/