Listing various resources for a variety of topics, FYI, and FMI. :)
This is an excellent article from Psyche on approaching language learning as an autodidact.
STEAM at Work 4 Kids - self-explanatory
Asteroid Impacts - AAAS/Subaru Prize website
Author Patricia Newman has a blog wherein different kid lit STEM/STEAM authors write posts about activities you can use in the classroom to teach science in combination with literature.
If you want to test out tons of different fonts simultaneously, check out Google Fonts.
NASA's Reach Across the Stars website lets you learn more about female scientist and has cool downloadables and videos.
Native Land provides both an interactive map of the indigenous population of the Americas and also has a more detailed site you can explore.