I'm planning on entering graduate school to obtain a PhD in elementary particle physics. I graduated in 1996 with a physics major. I have NOT worked in this field since that time - I now have a J.D. instead. I need to refresh my math and physics skills to take the GRE. I would imagine a year or two of courses before I'm ready to take it. I need to know what people would recommend to brush up on skills. Obviously, I do not want to start with Classical Physics I all over again. Here's what my undergrad experience consisted of: Classical Physics (I, II, and III plus labs) Applied Math for Physics and Engineers Quantum Mechanics Electronics & Instrumentation (plus lab) Experimental Modern Physics Electromagnetic Fields Classical Dynamics Linear Algebra Differential Equations and others I can't recall now. I've never had a thermodynamics course, and I need to brush up on math skills, so those are areas I will probably focus on again. What else can people recommend?