1. Learning 21st-Century Skills Requires 21st-Century Teaching
2. M. E. Staples and J. Bartlo, CRME Publications 3 (2010)
3. Moving Students to “the Why?”
4. J. Mata-Pereira and J. P. Ponte, Education Study Mathematics, (2017)
5. NCTM, Principles and Standards for School Mathematics (NCTM Inc, Reston 2000)