Algebra Courses
Udemy Expressway to Data Science: Essential Math
University of Colorado Boulder via Coursera PreAlgebra
YouTube Algebra 1
YouTube Algebra 2
YouTube Crush Your Final Exams!
YouTube Quadratic Forms
statisticsmatt via YouTube Matrices
statisticsmatt via YouTube College Algebra - Full Course
freeCodeCamp Pre-Algebra Video Playlist
The Organic Chemistry Tutor via YouTube