<p>Don’t forget reading and writing, history, science, etc… . .;)<br>
One of my kids was really mathy at a young age–tested “post-high school” as a 1st grader-- he could do a lot of pre-algebra problems very quickly with perfect accuracy. (He is “on the spectrum,” but very high functioning.) He also did Math Counts (he was mediocre among the prodigies/true geniuses in that group), and, as homeschooler, just stayed a couple years ahead in the curriculum. In addition to calc, and stats he took accounting and finance in high school, but no college classes. He was NMF-- his math score was not perfect, but his writing score was. (He lacks verbal communication skills but is an excellent writer/editor. No grammar/punctuation/spelling error can get past him.) He is now doing very well as a CS major.
Enjoy your mathy kid!</p>