STEM AND SUMMER EDUCATION TOOLS AND RESOURCES
Dr. Natoshia Anderson has a Stemming in Stilettos Podcast, is pretty passionate about girls in STEM, making learning very accessible to all income groups, and is invested in STEM Mentoring Programs and speaking across the country.
Khan Academy - Lots of Math Resources, and ability to login and track as a parent or teacher for free at plenty of levels.
Crash Course - Multiple Liberal Arts and Science Subject Youtube Universe - Some topics are a bit more mature, maybe 4th Grade and Up, all the way to High School chemistry, literature, philosophy, and civics. Fantastic community of learners!