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Freshmen: Naviance Interest Inventory
Sophomores: PSAT
Juniors: PSAT
SAT Subject Tests: STEM majors and applicants to
some competitive US and UK colleges should take
  one or more of the following options:
Math Level 2: Algebra II or higher
  Science: Biology E/M, Chemistry, Physics
  Other area of strength
  ACT and/or SAT
  AP
Seniors: ACT and/or SAT
  SAT Subject Tests
  AP
  College placement tests