Duke TIP AP Manuals?

Test Preparation AP Test Preparation
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<p>Has anyone used these? Are they any good? Are there any publishers whose books are consistently good for AP exam preparation (Barrons, Cliff are some names I’ve seen here)?</p>

<p>I guess for right now I am most interested in bio, chem, and euro or world hist.</p>

<p>Also, how hard would it be to self-study chem? My kid just found out it won’t be offered at our school.</p>

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<p>From the general idea I see in most threads in here…Chem is prob one of the hardest…</p>