States should raise high school graduation requirements to ensure that the high school diploma has value.

Research by Achieve and others indicates that students headed to college or into the workforce after graduation need the same knowledge and skills, particularly in English and mathematics, to be successful. At a minimum, high school course requirements need to cover four years of rigorous English and four years of math, including Algebra I, Geometry, Algebra II and data analysis and statistics.

However, while nearly every state requires students to study specific subjects for a certain number of years or to take specific courses to graduate, only twenty states and the District of Columbia have graduation requirements that expect four years of rigorous English and math through Algebra II.

Raising Graduation Requirements Helps Disadvantaged Students

New research indicates that more rigorous study is crucial to reducing the achievement gap between white and minority students. According to the U.S. Department of Education's "Answers in the Toolbox" study, taking challenging math courses through at least Algebra II cuts the gap in college completion rates in half between African American and Latino students and their white peers.

Equally important, research also shows that students who take more rigorous courses are significantly more likely to succeed in postsecondary education and the workplace than other students. For example, ACT has found that students who take Algebra I, Geometry, Algebra II and one additional higher-level course are much more likely to succeed in college-level mathematics, while the Educational Testing Service found that the vast majority (84 percent) of those who hold highly paid professional jobs have taken Algebra II or higher.

Unfortunately, unless states require a more rigorous curriculum for all students, not all students will have the opportunity to take these courses. In communities where a college-preparatory curriculum is not required, disadvantaged students are less likely to be in schools that offer college-prep courses, may not know which courses they need to take, or may require approval of a guidance counselor or school administrator to enroll. The National Center for Education Statistics found that, among the high school graduating class of 2000, nearly half (47 percent) of white students and more than two-thirds (69 percent) of Asian students took a math course beyond Algebra II, but only 29 percent of American Indian, 31 percent of Latino and 32 percent of African American students did. Furthermore, in a subsequent study with the graduating class of 2004, NCES found that students who took a math course beyond Algebra II in their senior year made sizeable and significant gains in their math achievement by the end of high school compared to students who had stopped at or below the Algebra II level.

A State Example: Indiana

Indiana has a long-term strategy to create a more rigorous education system aligned with postsecondary and business expectations. Beginning in the late 1980s, the state brought together business, K–12 and higher education leaders to identify what students need to know to be prepared for postsecondary education or employment. Based on the findings, the state established a more challenging roster of college- and work-preparatory courses in English, mathematics, science and social studies, which was ratified in 1994 as the (optional) Core 40 curriculum. To ensure that students are learning the content in those courses, the state administers end-of-course assessments in Algebra I and 11th grade English and it is pilot-testing assessments in Algebra II, Biology I and U.S. history.

Although participation in the Core 40 originally was voluntary, the state strongly encouraged schools to offer the courses and students to take them. The percentage of students earning a Core 40 or more rigorous Academic Honors diploma rose from 13 percent in the 1993–94 academic year to 62 percent in 2003–04. Since the mid-1990s, when this work began, Indiana has moved from 40th to 10th in the nation in the percentage of high school graduates going to college.

Building on this success, the Indiana Education Roundtable, co-chaired by the governor and state superintendent of education, recommended that the state make the Core 40 the default high school curriculum for all students as part of a broader P–16 Plan for Improving Student Achievement. In 2005, the Indiana Legislature approved this recommendation, starting with the class of 2011. Also as of fall 2011, a Core 40 diploma will become an admissions requirement for public, four-year colleges and universities in the state.