Deci, E. L., & Ryan, R. M. (2000). The "what" and "why" of goal pursuits: Human needs and the self-determination of behavior. Psychological Inquiry, 11(4), 227–268. https://selfdeterminationtheory.org/SDT/documents/2000_DeciRyan_PIWhatWhy.pdf 

 Millacci, T.S. (2022). How to Motivate Students: 12 Classroom Tips and Examples https://positivepsychology.com/how-to-motivate-students/