The course "Methods of Computer Modeling I" is aimed at demonstration of the possibilities of numerical solution of various problems of nanooptics and electrodynamics in the Comsol Multiphysics. The course contains several basic optical problems, such as search for eigenmodes of optical waveguides and resonators, calculation of reflection/transmission of radiation through layered structures, light scattering by nanoparticles. The physics of the considered problems is covered in other courses in the same semester. During the work, students will learn how to build correct models, analyze the obtained results, and evaluate their accuracy. To successfully complete the course, students will have to fulfill several assignments on the considered topics.