Course number 1 explains the concept of periodicity and the different Bravais Lattices possible to achieve lattice structures in 3 dimensions.
Course number 2 gives an introduction to space groups, space group diagrams and the effect of symmetry elements.
Course number 3 gives detailed explanations of the understanding of space groups. Coordinate representations, interplay of symmetry elements, space group symbols, Wyckoff positions, and group relationships will all be covered.
Course number 4 (coming soon!) is for those interested in some of the more maths-y parts of crystallography. It will explain some parts that were only brushed over in course 3 alongside explaining the origin of forbidden reflections in diffraction patterns of crystalline materials.