Best way to teach myself math from the ground up?

[cookderosa]

There are gazillions of free curriculum sites, too many in fact. So, I have no idea where your "ground" level is, so I'm going to give you what I have and maybe some of it will help. I would suggest starting a level earlier than you think you are and doing some good review. You might be surprised at how a few gaps in early understanding of math probably contributed to a bigger problem later. For instance, I was helping my son with fractions one day, I was probably 30 years old, and it hit me like a ton of bricks- wait, fractions and percents and decimals all mean the same thing!?! CRAP!?! LOL Then it took me about 10 minutes to learn what I tried to learn for several grades in school as a kid. Who knew? banghead

All of these are free.

Basic arithmetic facts (add/subtract/multiply/divide) in an online quick flashcard format. https://xtramath.org/

Basic arithmetic printables & online problems (up to fractions/percents/decimals/very basic algebra and geometry concepts). Free Printable Math Worksheets

Basic arithmetic through calculus in an online video/demo format. Includes online problems. https://www.khanacademy.org/

Saylor grade 6 through calculus (answer keys NOT provided but excellent instruction otherwise) Math « Saylor Academy

PurpleMath - a mix of grade 6 through calculus including an online calculator for complex equations Purplemath

Saxon Math- pencil/paper books and teacher texts (this is the math we use in our homeschool) Grades K-calculus Saxon Math Homeschool

Education Portal- college math and up . Videos and online quizzes. Math 102: College Mathematics Course - Online Video Lessons | Education Portal

Slow and steady wins the race.