We need better parents. Parents more focused on their children’s education can also make a huge difference in a student’s achievement. How do we know? Every three years, the Organization for Economic Cooperation and Development, or O.E.C.D., conducts exams as part of the Program for International Student Assessment, or PISA, which tests 15-year-olds in the world’s leading industrialized nations on their reading comprehension and ability to use what they’ve learned in math and science to solve real problems — the most important skills for succeeding in college and life. America’s 15-year-olds have not been distinguishing themselves in the PISA exams compared with students in Singapore, Finland and Shanghai.