President Barack Obama is delivering the commencement address at a Massachusetts high school, the latest in a string of honors for a school whose demographic and educational profiles make it a model of achievement.

Obama will speak to the Worcester  Technical High School graduating class in a week devoted to his education policies. Obama has promoted programs that break from the traditional classroom format or that are designed to improve the nation's science and technology workforce.

The Worcester school stands as an example of a triumph against the odds.

Six out of 10 students at the high school are underprivileged and qualify for free or reduced meals; two out of 10 have special needs. Last year, it was one of the Education Department's 286 national blue ribbon schools.