Use this link to find many resources to prepare for College Admissions testing: SAT Practice Resources

PSAT/NMSQT   (Preliminary Scholastic Aptitude Test/National Merit Scholarship Qualifying)
Test Duration - Approximately 2 1/2 hours; given on Wednesday in mid-October
Taken by - High school juniors (available to interested sophomores)
Given by - College Board and National Merit Scholarship Corporation
Frequency - One time per year (October)
Purpose - Practice for SAT and qualify for National Merit Scholarship

SAT   (Scholastic Aptitude Test)
Duration - Approximately 3 1/2 hours
Taken by - Juniors and Seniors
Given by - College Board
Frequency - Seven times per year (Saturday – usually offered in October, November, December, January, March, May, June)
Purpose - College Admissions for dates
Website - www.collegeboard.org

SAT II– SAT II – Subject Test
Duration - One hour per test (maximum of three per testing date)
Taken by - Juniors and Seniors
Given by - College Board
Frequency - Six times per year (Saturday – usually offered in October, November, December, January, May, June)
Purpose - College Admissions
Website - www.collegeboard.org

ACT   (The American College Testing Program)
Duration - Three hours
Taken by - Juniors and Seniors
Given by - ACT
Frequency - Six times per year (Saturdays – usually offered in September, October, December, February, April, June)
Purpose - College Admissions
Website - www.act.org

Advanced Placement Tests – Subject area tests
Duration - Two to three hours
Taken by - Students enrolled in AP courses
Given by - College Board
Frequency - One time per year, in May
Purpose - May fulfill college credit requirement
Website -  apstudent.collegeboard.org