1. a, ensuring no child is left behind.

　　2. d, students performances declined.

　　3. d, they are mostly small in size.

　　4. d, some large schools have split up into smaller ones.

　　5. c, their college-level test participation.

　　6. b, their school performance was getting worse.

　　7. a, maintain closer relationships with their teachers.

　　8. The proportion of students taking college-level exams

　　9. a look at many different measures

　　10. tackle tough subjects under the guidance of gifted teachers