The last few Mondays, I've focused on DIY Montessori materials. DIY Montessori materials are especially helpful if you have a Montessori homeschool or are using Montessori materials in an environment other than a traditional Montessori school.
For class word wall: A couple white sheets, a note sent home instructing mom to dress the kids in colorful clothes, and a ladder (and a photographer who is not afraid of heights! So fun! You could also do shapes.or spell out the name of the school!