Buck Institute for Education (Ed.). (n.d.). What is Project Based Learning (PBL)? Retrieved November 28, 2016, from https://www.bie.org/about/what_pbl
Flocabulary. (n.d.). Human Body Systems Worksheets - Human Body Systems for Kids - Flocabulary. Retrieved November 28, 2016, from https://www.flocabulary.com/unit/human-body-systems/video/
NCSD Curriculum - Natrona County Schools. (n.d.). Retrieved November 28, 2016, from http://natronaschools.org/departments/curriculum-instruction/ncsd-curriculum/
NGSS Lead States. (2013). Next Generation Science Standards: For states, by states (Vol. 2). Washington, D.C.: National Academies Press.
Redd, N. T. (n.d.). Valles Marineris: Facts About the Grand Canyon of Mars. Retrieved November 20, 2016, from http://www.space.com/20446-valles-marineris.html
Wilson, J. (Ed.). (2016, October 11). Journey to Mars Overview. Retrieved November 25, 2016, from https://www.nasa.gov/content/journey-to-mars-overview
Wood, D. (2012). Into the volcano: A graphic novel. New York: Scholastic.