Learn to use MFEM, a modular parallel C++ library for finite element methods developed at Lawrence Livermore National Laboratory, in this comprehensive tutorial from the lab's High Performance Computing Innovation Center. Discover how this open-source finite element toolbox provides essential building blocks for developing finite element algorithms across diverse computing platforms, from laptops to supercomputers, functioning similarly to how MATLAB serves linear algebra methods. Explore MFEM's capabilities for enabling high-performance scalable finite element discretization research and application development, supported by contributions from the worldwide computational science community. Gain practical knowledge of implementing finite element methods using this powerful library designed for high-performance computing environments and scientific simulation applications.