Scholarly and Creative Works
2018
- Ray, D. W. (2018). PreCalculus Online. Retrieved from https://www.youtube.com/playlist?list=PLEf0kNdWFpAD6uj9ktovIoTt_Rm4c-jWk
- Ray, D. W. (2018). Academic Meet Companion.
- Ray, D. W. (2018). Practice Tests for Mathematics Competitions.
- Ray, D. W. (2018). Quizzer. Retrieved from https://www.academicmeet.com/quizzer/
2017
- Ray, D. W. (2017). Academic Meet Companion. Retrieved from www.academicmeet.com/meet
2016
- Ray, D. W. (2016). Academic Meet Companion. Retrieved from www.academicmeet.com/meet
- Ray, D. W. (2016). Practice Tests for Mathematics Competitions.
- Ray, D. W. (2016). Competition Tests for Mathematics Competitions.
2015
- Ray, D. W. (n.d.).
- Ray, D. W. (2015).
- Ray, D. W. (2015).
- Ray, D. W. (2015).
2014
- Ray, D. W. (2014). High School Mathematics Virtual Test.
2013
- Ray, D. W. (2013). Problem 61 Workbook.
- Ray, D. W. (2013). High School Mathematics Virtual Test.
2012
- Ray, D. W. (2012). Mastering Number Sense Workbook: Practice Problem Workbook.
- Ray, D. W. (2012).
- Ray, D. W. (2012). PSIA Special Topics in Junior High Number Sense.
- Ray, D. W. (2012). High School Mathematics Virtual Test for Regional and State Practice.
- Ray, D. W. (2012). High School Mathematics Virtual Test for Regional and State Practice.
2009
- Ray, D. W. (2009). Mastering Calculator Applications.
2007
- Ray, D. W. (2007). Mastering Number Sense Workbooks 1 and 2.
2005
- Ray, D. W. (2005). Problem 41 Workbook.
2003
- Ray, D. W. (2003). Problem 21 Workbook.