🇺🇸 Phung-Hieu Diep

Phung-Hieu Diep — he goes by Hieu — grew up in San Jose, in a Vietnamese American family in the heart of Silicon Valley, a region that reveres precocity but rarely produces a story like his.

His acceleration began in third grade, when Hieu realized the coursework in front of him was years behind his ability. Rather than endure the wait, he took placement tests to skip middle school and high school entirely — and passed all of them.

At ten years old, an age when most children are learning long division, Hieu enrolled at Evergreen Valley College in San Jose, taking on a full college curriculum alongside classmates nearly twice his height and often three times his age.

He did not merely survive college; he ran the table. Over two years he completed an associate degree in mathematics with a perfect 4.0 grade point average, and in May 2026 the college named him valedictorian of his graduating class — at twelve.

Bay Area station ABC7 and outlets across the country picked up the story, and it traveled for a reason beyond the arithmetic of his age: Hieu is, by every account, a cheerfully normal kid. He calls his friends on Discord and Google Chat, and plays Minecraft and Roblox between problem sets.

Alongside coursework, Hieu built a research portfolio. Inspired by a visit to his parents' home country of Vietnam, he investigated harmful bacteria affecting catfish aquaculture — a real economic and food-safety problem in the Mekong Delta, where catfish farming is a major industry.

The work is not a science-fair curiosity. His research on catfish outbreaks is set to be published in a scientific journal, and he was invited to present it in Washington, D.C. — a publication credit most students do not earn until graduate school.

The research also gave him a direction. Hieu has said he wants to become an infectious disease physician, a goal born directly from studying how pathogens tear through aquaculture populations — and one that would put his initials to literal use.

He told reporters the experience had been 'amazing' — a characteristically understated verdict on a college career that made him one of the youngest valedictorians in American higher education.

The mechanism that made his path possible deserves attention. California's community college system allows concurrent and early enrollment for students who can pass placement examinations, regardless of age — a policy designed for adult returners that quietly doubles as one of America's most effective acceleration routes for profoundly gifted children. Hieu's family used it exactly as designed: no lawsuits, no special programs, just examinations passed and seats earned.

His choice of research subject is telling. Catfish aquaculture in the Mekong Delta is one of Vietnam's most important export industries, employing hundreds of thousands of people, and bacterial outbreaks can devastate entire farms in weeks. By choosing a problem rooted in his family's homeland, Hieu joined a long tradition of diaspora scientists directing first-world research capacity at the problems of the countries their parents left.

The valedictorian selection itself is worth pausing on. Evergreen Valley College graduates students of every age — working adults, transfer students, career changers — and the honor went to the twelve-year-old not as a novelty but on the numbers: a perfect 4.0 across a full mathematics curriculum. The college's faculty, quoted in local coverage, described a student who asked questions that redirected entire class discussions.

Child development specialists often warn that radical acceleration can cost children socially. Hieu's case is a useful counterexample precisely because his social life stayed age-appropriate while his academics did not — daily Discord calls, Minecraft servers, Roblox sessions with friends his own age. The acceleration was academic, not social, and his family treated the two as separable — which, his outcome suggests, they are.

His graduation moment carried a symbolism the cameras could not resist: a twelve-year-old in an adult-sized gown, delivering a valedictory address to classmates who could have been his teachers, in the heart of a valley that prizes youthful genius above almost everything. Silicon Valley's founding mythology is full of dropouts who left school early to build things; Hieu inverted the myth — he arrived early, finished perfectly, and left with a publication credit rather than a startup pitch.

Hieu's path now points toward a four-year university, further degrees, and a medical career that could begin while his former elementary school classmates are still in college. American academia has seen young graduates before — Michael Kearney finished a bachelor's degree at ten — but a twelve-year-old valedictorian with a publication pending occupies rare air even in that company.