Human Gr. and Dev. CLEP study question...

[S.Tesla]

My daughter did the full Modern States course including all but maybe two of the readings.  She also read through the REA book and did the practice tests and did well.  She is doing the Peterson's tests for more practice, but she is struggling with those a bit.   Are the Modern States plus REA enough to pass the test? How good are the Peterson's tests for that particular exam? Thanks