There are several online websites where you can practice taking academic and career tests such as the GMAT, MCAT, LSAT, Praxis, TOEFL, and more.
Testing & Education Reference Center (Thomson/Gale)
Over 100 practice tests and courses: GRE prep, GMAT prep, LSAT, MAT, Graduate school search, PRAXIS, TOEFL, Civil service and licensure exams, SAT, and more.
www.4tests.com
Under Educational are links
to GMAT, GRE General, LSAT, MCAT, CLEP, TOEFL TOEIC, SAT, PSAT;
Professional also covers PRAXIS, NCLEX, ASVAB, and several others. When
you take the test, you see one question at a time with a link to see
correct answer.
www.theprincetonreview.com/free-*online*-*practice*-*tests*
Princeton Review. Covers SAT, ACT, GMAT, LSAT, MCAT, USMLE. After you take a test, you receive a score report showing your strengths and weaknesses.
www.ets.org
Educational Testing Service. The tests listed are AP, GRE, iSkills,
MAPP, PRAXIS, PSAT, SAT, TOEFL, TOEIC, and TSE. Access practice books for the GRE in PDF files. Site has
materials for both GRE general and GRE subjects.