Old DAT & Math Destroyer? Also exam pre question

[BrotherAli]

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Does anyone know if the old editions differ from the new 2013 edition? For example I can find the 2011 version for a large discount but not sure if there were any large changes?

Also this is what I am thinking about using to prep for the exam, please let me know if you guys feel this is the right course of action:

Bio:
-Cliffs AP Bio, 7th edition Kaplin DAT (heard 7th is better than 8th)
Chem:
-DAT Destroyer, Chads videos
Math:
-Math Destroyer
PAT:
-Crack DAT PAT
Overall:
DAT Bootcamp, DAT Achiever, Topscore, DAT Destroyer

For Chads Ochem/GenC videos are these the ones everyone is referring to?

"2012 College General Chemistry" and "2012 College Organic Chemistry"

Or are they the HD series that are twice as long?

 

[ehdnwk]

for chads videos just get the DAT videos package and it comes with DAT HD organic chemistry and DAT HD general chemistry not the college ones.

 

[biomolecmed]

I have seen the new versions of Destroyer and Achiever. They have many new problems in different areas. If you want more practice material, try to get the newest versions.