How to learn math?

First make sure he can do algebra. Then teach him some physics and basic chemistry.Acid-bases, kinematics and stuff like that. Then pre-calculus, so trigonometry logarithms etc. Then move on to more physics and chemistry. Look on /sci/ they have good textbook lists.

teach him algebra, then trigonometry. Once you finish you those subjects, move on to physics and chemistry.

>>18488463
I would probably review pre-algebra to make sure he has the fundamentals down, and if not, drill. Some things are just purely rote memorization and performing exercises can aid that. Then algebra, at least touch on geometry (mostly in terms of proofs and logic), trig, then pre-calc and calculus. If you check with his school system they can probably walk you through the curricula through 12th grade.

Basic chemistry requires proficiency in algebra.

So does basic kinematics in physics.

I'd probably not go past extremely linear motion in physics until trig. With trig you can look at circular/periodic motion and angles. When you hit calc you can do more complicated modeling and how the simpler algebraic models are derived.

Where are you in terms of your own math proficiency?

The thing about teaching something like math is to make sure they have a good grasp of current material before teaching something that builds on that.

I find that constant review of older concepts helps a lot.