Anyone know of some good, free online resources for improving

khanacademy.org is good for math

>Math
https://www.khanacademy.org/math

>Government
Assuming you're American based on your picture of Quantum Leap:
https://www.khanacademy.org/humanities/us-history/american-civics-parent

>Writing, Grammar, Vocabulary
Read high quality books and news articles (that you're actually interested in) by high quality authors and write about them with the intensity you'd expect out of an honors student.

See a word you like that you find useful and see yourself using? Record it down and find ways of using it in your conversations and writing.

Resources:
Your library
Library Genesis
https://www.gutenberg.org/
https://en.wikipedia.org/wiki/The_Elements_of_Style
https://www.reddit.com/r/AskReddit/comments/5psscm/what_grammar_mistake_is_disturbingly_common_but/

Apps:
https://play.google.com/store/apps/details?id=com.merriamwebster&hl=en
https://play.google.com/store/apps/details?id=com.flyersoft.moonreader&hl=en

Seconding Khan academy. Those are actual lessons there.

For reading
https://archive.org/details/practicalmathema029284mbp

Practical Mathematics (1919) just an example I left open. Didn't know how long it has been you have last time opened a text book :)

You can search books by the topic or name.