If you're looking for a beachy STEM classroom these posters fit perfectly. There are 8 Einstein quotes that relate well to classroom behavior/management/ growth mindset. Print them out and laminate, then you're good to go. The letters are also included.
To see a preview of how this looks on a wall, please feel free to head to my Instagram page @surfingandstem and I'll be putting them up in Summer 2018.