I studied for about two weeks. I found it pretty difficult initially but after a week of weeping and gnashing of teeth , I finally got the hang of it mostly. I scored a 73, using primarily IC. IC was by far the best resource. I also did the practice test in the AP Economics book and studied the answers to the questions...found that practice test helpful also.

I'd say 2 weeks should be fairly good, if you have the time for some serious study during those weeks.

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DONE! History degree from TESC!

CLEPS:
College Math-69, Sociology-70, Humanities-72, Am. Lit-61, English Lit-69, S. Sciences & History-65, Eng. Comp/w essay-75, Microec.-64, Macroec.-73, Western Civ. I-71, Western Civ. II-71, American Gov't-71, US History I-75, US History II-65, A&I Lit-77, Prin. of Mgmt-76, Prin. of Mktng-76. Biology-69

DSST's:
Civil War & Reconst.-70, Modern Middle East-63, World Religions-76, Tech. Writing-67, Prin. of Supervision-67, HR Mgmt-69, Rise & Fall USSR-64, Vietnam War-60, Ethics-69. Intro to Bus-67, Org. Behavior-69, W. Europe-60