Links to interesting articles:

About metacognition in young children: http://www.uft.org/teacher-teacher/helping-students-become-self-aware-learners

About math for infants: https://www.livescience.com/40576-infant-math-ability.html

Importance of fingerplays:

https://www.theatlantic.com/education/archive/2016/04/why-kids-should-use-their-fingers-in-math-class/478053/?utm_campaign=the-atlantic&utm_content=5c4284aa9ac5640001ea6c3f_ta&utm_medium=social&utm_source=facebook