Nursing Theory (our program follows Orem)
/ Diagnosis / Care Plans
Bowel / Urinary Elimination
Vital Signs (all things respiratory and cardiovascular)
Safety / Transfers
Electrolytes & Fluid Imbalances (my least favorite)
Clinical Skills: Vitals, Transfers, Infection Control, Foley, Enema, NG Tube Feedings, Suctioning, Wound Care, Range of Motion Exercises, Medications via every route including I.V., injections, etc., Bathing, Peri-Care, Oxygen administration, etc.
I would recommend reviewing any websites that are affiliated with your textbooks.
If you want to get a head start, you're safe reading the textbook covering Nursing Theory and Infection Control.
Good luck in your studies.