The document discusses five key principles of effective differentiation: respectful tasks, quality curriculum, flexible management, continual assessment, and building community. It states that continual assessment, which requires instruction based on individual student assessments, will be the most difficult principle for the author to implement due to the challenges of teaching students at varying levels simultaneously. The author foresees potential obstacles in properly implementing the principles to achieve student success. However, the author also notes that all five principles seem easy to accept as they promote leadership, accountability, organization, and teamwork in the classroom.