After four years of shaking up Massachusetts public colleges and pushing for cuts in tuition, James F. Carlin confirmed rumors Friday that he will step down from his position as chair of the state's Board of Higher Education.

Although he has been semi-retired for some time, Carlin has spent the last several years working essentially full-time in the volunteer chairperson position.

His efforts are appreciated, and recent achievements of the Board reflect his dedication to improving public higher education, according to Chancellor of the Board Stanley Z. Koplik.

The Board of Higher Education oversees 175,000 students in the public university system, which includes the five University of Massachusetts campuses, nine state colleges and 15 community colleges.

In an effort to improve the education of those 175,000 students, the Board's goals include increasing affordability and access to public higher education, raising admissions standards, improving retention and graduation rates, promoting institutional efficiency and maximizing private fundraising, according to a press release issued yesterday by the Board of Higher Education.

During Carlin's term, the board has made substantial progress in working towards these goals, Koplik said in the press release.

According to Koplik, the Board has decreased system-wide tuition by an average of 17 percent over the last four years and financial aid to students at public institutions has been increased by 44 percent.

Koplik also said the Board has raised admission standards for four-year public institutions twice in the last four years, without negatively affecting enrollment.

It also developed the new Commonwealth College, a freestanding honors college at the University of Massachusetts at Amherst.