Mathematics problem of the day: building clarity in mathematics communication

REFERENCES
Brown, GA, & Daines, J.M. (1981). Can explaining be learnt Some lectures' views. Higher Education, lQ. 573-580. Bush, A.J., Kennedy, J.J., & Cruickshank, DR. (1977). An empirical investigation of teacher clarity. Journal of Teacher Education.
Detlef RP. Communication and Effective Teaching. Community Eye Health Vol 13 No. 35. George WC) Teacher Clarity in the Middle School Classroom A Functional Review of Research, Middle School Research Selected Studies, 12:1, 36-64,
DOI:10.1080/08851700.1987.11670279.
Rosenshine, B. & Stevens, R. (1986). Teaching functions. In MC. Wittrock (Ed, Handbook of Research on Teaching. New York MacMillan Smith, LR, & Cotten, ML. (1980). Effect of lesson vagueness and discontinuity on student achievement and attitudes, Journal of Educational Psychology. Wood, MB, Turner, E. E, Civil, M, & Eli, J. A. (Eds. (2016). Proceedings of the 38th annual meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education. Tucson, AZ The University of Arizona.