Related Clues:

• Ally of the U.S.
• High school subj.
• School subj.
• Phys., but not phys. ed.
• Chang's Siamese twin
• H.S. subject
• H.S. class
• Chem. or biol.
• Area of coll. study
• Fi leader
• Bill Nye's subj. on TV
• ___-fi (book genre)
• H.S. course
• Sch. subject
• See 34-Across