“INFLUENCE OF PRODUCTIVE STRUGGLE IN MATHEMATICS TO THE 21st CENTURY LEARNERS: Received: 03rd February 2022; Revised: 23rd May 2022, 15th June 2022, 12th July 2022; Accepted: 13th July 2022” (2022) Docens Series in Education, 3, pp. 71–92. doi:10.20319/dv3.7192.