SAN DIEGO (CBSLA.com) — A San Diego man believes there’s always room to learn and he’s living proof.

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Wally Taibleson Friday received his Master of Arts in Education from Cal State San Marcos (CSUSM) at the age of 90.

The degree marked his fourth.

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Taibleson already has two master’s degrees from the college.

He has also earned a bachelor’s in history, the San Diego Union-Tribune reported.

“Any time that you can devote to improving your mind and increasing your learning is valuable for you as well as those you associate with,” Taibleson said.

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Taibleson is the oldest student in the California State University system and the oldest graduate of CSUSM, according to the school’s website.