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Common Core Documents and Links
WHY STUDY MATH?
Common Core State Standards for Mathematics Document
Please read page 147 "additional mathematics courses" . This
page sums up the effectiveness of Common Core and explains
that a student must go beyond Algebra 2 in mathematics to
have increased probability of succeeding in college.  
Something like 37% of students that take Algebra 2 in high
school and not Trig, or Precalculus or Calculus finish college
and of them only 2% finish a STEM college program.
CommonCoreMathematics