This study aimed to create a new collaborative culture at Eastside Montessori School through developing a writing rubric across grade levels and implementing a professional learning community. Teachers collaborated over several months to create the rubric, which was intended to improve writing skills and alignment with standards. The researcher collected data through teacher surveys and journals to evaluate the impact on teacher collaboration, motivation, and the school culture. While initial results showed success in developing collaboration and the rubric, limitations included the short implementation time and sustainability of the professional learning community, which require further study.