Most of the people on here are either going for visitors visa, student visa or business visa.

There are two other classes of visas that are available, especially to students.

1) Summer Work Travel Program

College and University students enrolled full time and pursuing studies at post-secondary accredited academic institutions located outside the United States come to the United States to share their culture and ideas with people of the United States through temporary work and travel opportunities.

Summer Work Travel Students must be:
Sufficiently proficient in English to successfully interact in an English speaking environment;
Post-secondary school students enrolled in and actively pursuing a degree or other full-time course of study at an accredited classroom based, post-secondary educational institution outside the United States;
Have successfully completed at least one semester or equivalent of post-secondary academic study; and
Pre-placed in a job prior to entry unless from a visa waiver country.

Benefits
The Summer Work Travel program provides foreign students with an opportunity to live and work in the United States during their summer vacation from college or university to experience and to be exposed to the people and way of life in the United States.

Programs
Au Pair
Camp Counselor
College and University Student
Government Visitor
Intern
International Visitor
Physician
Professor
Research Scholar
Secondary School Student
Short-Term Scholar
Specialist
Summer Work Travel
Teacher
Trainee

Summer Work Travel 2017 - 2018 Season Program Dates by Country
For External Use - Updated 11/13/2017

Nigeria 1-Jun 1-Oct 4 Months (this means that Nigerian are allowed, of course if accepted, to go to the US and work during these period).

To read up on this please visit

https://j1visa.state.gov/programs/summer-work-travel/

Do you think you are wiser than the visa officials?