When NITARP was more focused on the infrared (mostly in the Spitzer era), participating teachers were given a kit full of materials to aid in their teaching about infrared. While we no longer distribute these materials (since the programs are now much more diverse than 'just' infrared), we have retained the most important "meat" of the kit here. This is substantially based on the SOFIA kit, which you can purchase from the ASP. The materials that come with their kit can be found here, though please note the errata for updated links.
Updated versions of these materials as they apply to the NITARP kits are available here on this page!