"Constructing and Unpacking Diagrams in Geometry" just came out in the June 2020 issue of Mathematics Teacher: Learning and Teaching PK-12. Read article available through Rod Library.
Only those associated with UNI (students, faculty, staff, etc.) will be able to access the full text of the article. Citation information is listed below for those affiliated with other institutions.
Conner, K. (2020). Constructing and Unpacking Diagrams in Geometry. The Mathematics Teacher, 113(6), 516-519