Material created by SciHigg (Justin Higgins) uses Creative Commons, GNU free, Public Domain & originally created materials. See attached attributions lists for each material to see sources.
All materials created by Justin Higgins (SciHigg) are published under a Creative Commons 4.0 International By Noncommercial (CC BY-NC 4.0) license.
*The use of AP, Advanced Placement, or the College Board terminology does not in anyway state endorsement by AP, Advanced Placement, or the College Board.
**The use of NGSS terminology does not in anyway state endorsement by The National Research Council (NRC), the National Science Teachers Association, the American Association for the Advancement of Science, or Achieve.