Coalition for Plasma Science: Teacher's GuideHere you'll find a treasure trove of resources for teaching about plasma science at the high school or introductory undergraduate level. It could be very helpful to upper-division students who plan to teach astronomy at the secondary level. There's general information about space and solar plasmas, auroras, the fusion process, plasma propulsion in space, state-by-state outreach programs on plasma science, and full lesson plans.
University of Calgary Energy Education: Blackbody RadiationThis page from the University of Calgary's Energy Education project offers a succinct but understandable set of resources including the PhET sim on blackbody radiation, a video on the ultraviolet catastrophe, and an explanation of Wien's Displacement Law. Could be a great refresher for HS teachers, who may also wish to share it as part of a lesson in their own classrooms.
PBS Learning Media: Earth's Albedo and Global WarmingThis interactive module from PBS could be a great resource for inservice high school teachers of Earth Science, Physics, and/or Astronomy. It takes students on a video-based exploration of the feedback systems affected by Earth's albedo. It covers the ice-albedo feedback loop, soot's effect on ice melt, sea ice, and the effects of ice melt on land and sea. The module is too simple for upper-division physics students, but HS teachers often benefit from turnkey resources they can use immediately in the classroom. Helping secondary teachers identify high-quality free resources is a primary objective of the DigiKits.
Veritasium: Where Does the Sun Get Its Energy?One challenge for HS teachers is justifying teaching about exoplanets within the defined curriculum framework of a physics course. This 6-minute video from Veritasium's Derek Muller explains nuclear fusion in stars in a way that is comprehensible to secondary students AND aligns nicely with NGSS content standards related to fusion processes in Earth's sun. In his inimitable fashion, Dr. Muller uses a physical model of water-filled balls to show the proton-proton chain reaction in our sun. He also nicely explores how Einstein's famous equation is a mathematical representation of how mass is converted to energy in fusion processes.
PV Education: Blackbody RadiationIdeal resource for preservice high school teachers who may not have an extensive background in astronomy and/or quantum mechanics. This tutorial explains what blackbody radiation is, gives tips on how to "take care" with the units in calculation, and has a very responsive user-controlled graph of spectral intensity vs. wavelength (user can adjust the temperature in K). For the less experienced student, the tutorial gives a great explanation of how the Stefan-Boltzmann Constant is used in calculating total power density.