We already teach 12 years of math, from 1st grade to 12th: Addition, subtraction, multiplication, division, polynomials, rationals, pre-algebra, algebra, geometry, trigonometry, pre-calculus, calculus, sometimes probability and statistics. How much more math do you want?
Also, you do not need to know Calculus, or pre-calculus, or trigonometry, or geometry, or algebra, or pre-algebra in order to build, say an Android twitter app.
Also, you do not need to know Calculus, or pre-calculus, or trigonometry, or geometry, or algebra, or pre-algebra in order to build, say an Android twitter app.