Foreign Language Specialized School

Foreign Language Specialized School (Vietnamese: Trường Trung học phổ thông chuyên Ngoại ngữ), commonly known as FLSS or CNN, is a public magnet high school and university-preparatory school in Hanoi, Vietnam. A child high school of VNU University of Languages and International Studies, the school is one of four nationally-owned gifted high schools in Hanoi. Currently, FLSS is Vietnam's only high school specialized in teaching foreign languages (Chinese, English, French, German, Japanese, Korean and Russian). Students can also choose to study the above languages, alongside Italian and Spanish as a Second Foreign Language subject.

FLSS ranks third nationally in the 2012 Vietnam university admission ranking. Admission to FLSS is by competitive examination only, which until 2016 consisted of three subjects: specialized foreign language (self-declared by examinees), mathematics, and literature. Since 2017, the admission process has adopted a more comprehensive approach. There are now three parts to the admission exams: one on declared foreign language, one on mathematics and natural science subjects, and one on literature and social science subjects. Non-English language exams require an interview round beside the written tests. FLSS is one of the most selective high schools in Vietnam with an acceptance rate of approximately 11% in 2017.

A student from FLSS/CNN is usually referred to as a CNNer.