Sterling Partners has announced its third deal over the course of three days.

The Chicago private equity firm purchased PlattForm Advertising, a marketing and enrollment-management service used by universities, the day after it acquired Spartan College of Aeronautics and Technology in Tulsa, Okla.

And on Monday, Jan. 7, Sterling announced the sale of Pacific Interpreters, a healthcare -focused provider of interpretation and translation services, to Language Line Services of Monterey, Calif.

Terms for each of the three deals remain undisclosed.

Lenexa, Kan.-based PlattForm provides analytics-based marketing services to create marketing campaigns for career schools and traditional colleges and universities. The target’s founder, Michael Platt, is partnering with Sterling and will retain an equity interest in the company.

Meanwhile, scooping up Spartan College speaks to Sterling’s penchant for education deals. The school serves as an aviation-maintenance and  training facility for pilots and technicians. Sterling’s other education assets include Educate Inc., a tutoring and supplemental education service, as well as School of Rock, which offers instrument and vocal lessons to music students.

Sterling, with offices in Baltimore, Chicago and Miami, focuses on investing in education, healthcare and business services. The firm’s other portfolio companies include Educate Inc., Remedi Senior Care and First Choice Emergency Room.

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