Three out of four graduates aren’t fully prepared for college and likely need to take at least one remedial class, according to the latest annual survey from the nonprofit testing organization ACT, which measured half of the nation’s high school seniors in English, math, reading and science proficiency.

Only 25 percent cleared all of ACT’s college preparedness benchmarks, while 75 percent likely will spend part of their freshman year brushing up on high-school-level course work. The 2011 class is best prepared for college-level English courses, with 73 percent clearing the bar in that subject. Students are most likely to need remedial classes in science and math, the report says.