Bob MacArthur


I am Bob MacArthur and this is my 10th year teaching at HRHS.  Over the years at HRHS I have taught Earth Science, Geology, Astronomy, Meteorology, and Biology.  Every year I also take students from HRHS on science and cultural based field studies.  I have taken students to Hawaii, Iceland, Ecuador, New Zealand, Australia, and Fiji.  Experiential science education is a fundamental part of my teaching philosophy.  My hope is that my students, through what I teach, will have a better understanding about the natural environment around them whether that is here in Colorado or the other places throughout the world.  

If you have any questions please feel free to contact me via email at:

I look forward to having a great school year!

Bob MacArthur
HRHS - Science 2018/2019
Teacher Information
  • I am available during my planning periods.  During 1st semester my planning periods are 3rd and 4th period.  As for 2nd semester my planning periods are 2nd and 5th periods  I am also available by appointment.

School Links:

Infinite Campus
HRHS Home Page
Learning Commons