Final answer:
Mrs. Santos can consider using alternative mediums like colored pencils, markers, or digital painting apps, collaborating with local artists, or sourcing donations. She can also work with recycled materials or find arts-education funding and adjust her lessons to focus on color theory that can apply to various media.
Step-by-step explanation:
When faced with a scarcity of painting supplies in her art class, Mrs. Santos has several options to ensure that the learning competency of sketching and using complementary colors to paint a landscape is achieved. She can explore alternative mediums that may be more readily available or less costly, such as colored pencils, markers, or digital painting applications. She could also reach out to local artists or community members to source donations or organize a collaboration between her students and local artists. Another option is to implement a recycled materials project, where students use found materials to create their landscapes. Moreover, Mrs. Santos could look for grants or funding specifically aimed at arts education programs.
Mrs. Santos could also consider adapting her lesson plan to focus more on the theory of complementary colors and color mixing using paper or digital representations, which could then be applied to any creative medium the students have access to.