Welcome to the
North American Computational Linguistics Olympiad

at Stony Brook University

What is NACLO?

An exciting program for middle and high school students: the National Science Foundation-sponsored North American Computational Linguistics Olympiad (NACLO), a contest for US and Canadian students. The NACLO consists of a challenging and fun series of puzzles in computational linguistics which students have to solve during a 3 hour test. No previous knowledge of linguistics or computing is required since the puzzles can be solved with analytic reasoning and problem-solving skills.

Last year there were more than 1000 participants at 100 sites, and participation is growing. Winners of the Open Round are invited to the Invitational Round where the problems are harder. The winners of the second Round are eligible to participate in the international competition, the International Linguistics Olympiad, one of 12 international high school science Olympiads.

I am not familiar with Computational Linguistics. Can I participate in the competition?

Yes you can! Since the competition is on a subject not taught in most schools, we have designed it for students with no prior training in linguistics, computer science, programming, or foreign languages.

What knowledge and skills do I need?

You mostly need logical thinking, as well as basic general knowledge, such as arithmetic and standard calendar. As metioned above, we have designed the competition for students with no prior training in linguistics, computer science, programming, or foreign languages. Check out Practice Problems with Solutions to see what kind of problems will appear in the competition!

We will provide a training session for students interested in participating. The training session will include practice problems, test-taking tips, as well as an overview of linguistics and computational linguistics.

How do I register?

Click here to register. Registration is free of charge. The deadline is Wednesday, January 29, 2014 at 3:00 p.m..
Be sure to select Stony Brook University as your test location!

Important Dates

  • Training session
    Sunday, January 12, 2014
    11:00 a.m. - 1:00 p.m.
  • Registration deadline 
    Wednesday, January 29, 2014

  • First round competition (open to all)
    Thursday, January 30, 2014
    10 am - 1 pm (Arrive by 9:30am)

  • Second round competition (invitational) 
    Thursday, March 13, 2014

Important Links & Resources:

Location of training session

Stony Brook University
Social and Behavioral Sciences Building, Room S-207
Stony Brook, NY 11794-5233

Location of the competition

Stony Brook University
Student Activities Center
Room 302
Stony Brook, NY 11794-5233

Directions to reach the Main Campus

Program Directors

Lori Repetti, Professor, Department of Linguistics
Yejin Choi, Assistant Professor, Department of Computer Science

Contact Information

Kristen La Magna
Center for Science and Mathematics Education
Tel: 631-632-9750
E-mail: cesame@stonybrook.edu