HS PAP/Grade Level Resources
Flipped Math - a full video course with notes and homework from Algebra 1 through Calculus. I wouldn't choose the common core course unless you wanted some really challenging materials. The traditional Algebra 1 and Algebra 2 seem more aligned with Arkansas standards.
ProfRobBob - Prof Rob Bob is (kind of) an internet sensation with his math videos and impeccable handwriting. He has videos for Algebra 1 through Cal 2, but no accompanying handouts or homework.
Khan Academy has come a long way since it began in 2008. It uses certified teachers for many of its videos and assignments.
Algebra 1 - https://www.khanacademy.org/math/algebra
Geometry - https://www.khanacademy.org/math/geometry
Algebra 2 - https://www.khanacademy.org/math/algebra2
Pre-Calculus - https://www.khanacademy.org/math/precalculus
Long+Live+Math at Home - Blend of textbook and online resources. Here is a spreadsheet with links to all of their materials, there are tabs for all grades at the bottom. This is a great resources organized by topic.
Educator.com YouTube Videos - YouTube videos created by engaging teachers for most subjects