I will discuss recent experiments to study nonequilibrium magnetization dynamics in an extended two-dimensional (2D) optical lattice. With effectively spin-1/2 bosons loaded into a spin-dependent checkerboard lattice, we use the lattice to separately control the resonance conditions for tunneling and superexchange. After preparing a nonequilibrium antiferromagnetically ordered state, we observe relaxation dynamics governed by two well- separated rates, which scale with the parameters associated with superexchange and tunneling. With tunneling off-resonantly suppressed, we observe superexchange-dominated dynamics over two orders of magnitude in magnetic coupling strength. Our experiment serves as a benchmark for theoretical work as the detailed dynamics of this 2D, strongly correlated, and far-from-equilibrium quantum system remain out of reach of current computational techniques.