<p>Between PR, REA Crash Course, 5toa5, and Barron's, which is the strongest?</p>
<p>my chem teacher personally recommended princeton</p>
<p>I used PR and got a 5…I haven’t seen the others so I can’t really compare.</p>
<p>Between PR, REA Crash Course, 5toa5, and Barron's, which is the strongest?</p>
<p>my chem teacher personally recommended princeton</p>
<p>I used PR and got a 5…I haven’t seen the others so I can’t really compare.</p>