This resource contains lecture slides on defining Einstein field equations, Einstein tensor, stress-energy tensor, curvature scalar, Ricci tensor, Christoffel symbols, Riemann curvature tensor, symmetry arguments by which 6 Schwarzschild metric tensor components vanish, symmetry arguments for why the non-zero components are functions of radius only, the differential equations for G00 and G11, and shell radius vs. bookkeepers radial coordinate.