In CA, you do not have to have a Mathematics major or a mathematical education major to teach math. You only have to have a bachelor's degree (in something) and a year's worth of teacher preparation classes, plus pass the state exam.

The test includes:
CSET: Mathematics: Algebra; Number
Theory (30 multiple-choice items; 4
constructed-response items: 3 in
algebra, 1 in number theory)

CSET: Mathematics: Geometry;
Probability and Statistics (30 multiple
choice items; 4 constructed-response
items: 3 in geometry, 1 in probability
and statistics)

CSET: Mathematics: Calculus; History
of Mathematics (30 multiple-choice
items; 4 constructed-response items: 3
in calculus, 1 in history of
mathematics