STEM Wall panels come in different 8 shapes and sizes. These are called modules and are shown here. If your classroom wall is uneven or a stud wall, you will need to fit a plywood backing sheets before adding the STEM Wall tiles on top. Using these panels, it is possible to completely cover your entire classroom wall or just a designated smaller part of it. All modules can be connected to any other modules of any size in 4 directions. With these modelar-sized panels, we can easily cover large wall surfaces by using the standard 800W x 1200L or 800W x 800L wall panels. Smaller modules are provided to cover up voids that are too small for the standard 800W wall panels. Smaller modules can also help covering up wall surfaces with windows, doors or other fixtures.