RECOMMENDED USMLE STEP 1 STUDY MATERIAL

Notes versus Textbooks? : Both are important for good reasons. Notes are high-yield factoids that you must know , while a text-book presents the same information in a more reader-friendly format creating an appropriate context to understand the concept clearly. For the USMLE, a practical approach is to start with the Notes and go back to text-books as a reference. For the Old IMGs out there, expecially for subjects that you feel totally blank on, starting with a text book and giving yourself more time for the exam (like 4-5 months instead of 3 is advisable.
Microbiology: Jawetz + Kaplan Notes. Some of my pals even liked reading Microbiology Made Ridiculously Simple. The best advice however is to stick to Kaplan Notes and use the other textbooks as reference or an alternate source for some topics, when Kaplan Notes seem too monotonous and Boring ;-)
Immunology: Jawetz Rocks !
Physiology: BRS + Kaplan Notes.
"The Auscultation assistant" is a great online free tutorial with picutres and sounds to learn about cardiac murmurs :-)
Pathology: Kalpan Notes + Goljan Audio Files !
Pharmacology: Lippincott's TextBook -

Biochemistry: Lippincott's TextBook -

Anatomy:
Neuroanatomy: High-Yield for Neuroanatomy is good enough !
Cross-Sections / CT-scans : An Excellent Free site for studying Cross-Sectional Anatomy and CT-scans is NetAnatomy.com
Histology Slides:WebPath has been the traditional source for studying histology slides.
Other good online material for Histology:
1. Muscle Histology Practice
2. Connective Tissue Histology Practice
3. Epithelial Tissue Histology Practice

source;usmletomd