QR and GC Study Material

[Superhuntress]

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Now that I am accepted, I have promised to help tutor my best friend for the DAT. He only scored a 14 on his QR and a 15 on General Chemistry, which is holding him back. Besides the great Top Score, Destroyer, Achiever, Kaplan materials, does anyone have any suggestions for what would be excellent study material specific to General Chemistry and Quant. Reasoning?