Test Guides

CLEP Practice Tests: This site has practice questions for the CLEP separated into 34 modules. After you complete a module it shows which questions were missed and correct answers.
CLEP Exam Descriptions: Detailed descriptions of all of the different CLEP exams.
CLEP Preparation from the College Board: You can download a free CLEP sampler or download subject guides for a fee.

Take a Free Practice DAT: 3-hour online test from Kaplan recreates exam conditions. After exam you get a detailed score report that breaks down your performance, area by area.
DAT Practice Questions:
This site has practice questions for the DAT separated into 28 modules. After you complete a module it shows which questions were missed and correct answers.
ADA.org: Dental Admissions Testing: American Dental Association site has information regarding the DAT, including registration, fees, scope of the exam, and help preparing for the exam.
DAT - At a Glance: Comprehensive site from Kaplan with information on colleges, universities and graduate programs, distance learning, financial aid, and more.

GMAT Practice Tests: This site has GMAT practice questions separated into 23 modules. After you complete a module it shows which questions were missed and correct answers.
GMAT Prep - Taking the GMAT: This page has basic information about the GMAT such as content, time limit, scoring, etc.
GMAT Preparation: This site has tips and advice for taking the GMAT. It also has practice questions with detailed explanations of the answers.
Free GMAT Preparation Tools: This site has lots of information about the GMAT and its content. There are also sample questions and a full-length practice exam.

GRE OnLine: Introduction to the Graduate Record Exam, including sample questions, tips on getting started, and an online registration form.
My GRE Tutor: Hundreds of GRE math & verbal practice questions and explanations. Full-length computer adaptive tests. Tutorials and hints for all possible GRE question types. Site is free but you must register.
GRE Practice Tests:
Site has practice questions for the GRE separated into 34 modules. After you complete a module it shows which questions were missed and correct answers.

LSAT Practice Tests: Site has LSAT practice questions separated into 5 modules. After you complete a module it shows which questions were missed and correct answers.
Law School Admission Council: This site has PDF files with information about the LSAT as well as practice questions with explanations and a complete sample LSAT.
30 Days to the LSAT: Offers free online tests, tips, and tutorials, including the Seven Deadly LSAT Sins and a Countdown to Test Day checklist.

MCAT Practice Tests: Site has MCAT practice questions separated into 34 modules. After you complete a module it shows which questions were missed and correct answers.
MCAT Student Manual: The MCAT Student Manual from the AAMC is comprised of an introduction and five sections that describe the content, types of questions asked and test preparation involved in taking the MCAT.
Free Practice MCAT: This is a practice test for the MCAT from Kaplan.com. You must fill out a lengthy membership form to take the test.

OAT Practice Tests: Site has OAT practice questions separated into 35 modules. After you complete a module it shows which questions were missed and the correct answers.
Optometry Admissions Testing Program: This site has information about the OAT as well as two practice tests. One test is computerized and the other is a PDF file.

PCAT Practice Tests: Site has PCAT practice questions separated into 31 modules. After you complete a module it shows which questions were missed and the correct answers.
PCAT Vocabulary Tests: This site has hundreds of short vocabulary tests to help prepare for the PCAT.

PRAXIS Home: This page contains information about the Praxis tests, tests dates and locations, and PDF files with previews of the tests. There are also study guides and practice tests available for purchase.
PRAXIS Practice Tests: Site has PRAXIS practice questions separated into 31 modules. After you complete a module it shows which questions were missed and the correct answers.