1. Barrett, J. E., Clements, D. H., & Sarama, J. (2017). Children’s measurement: A longitudinal study of children’s knowledge and learning of length, area, and volume. (Journal for Research in Mathematics Education Monograph Series, Vol. 16). Reston, VA: National Council of Teachers of Mathematics.
2. Students' Spatial Structuring of 2D Arrays of Squares
3. Dougherty, B. (2008). Measure up: A quantitative view of early algebra. In J. J. Kaput, D. W. Carraher, & M. L. Blanton (Eds.), Algebra in the early grades (pp. 389–412). Erlbaum.
4. Freudenthal, H. (1972). Mathematics as an educational task. Springer.
5. The Fourth Wall of Professional Learning and Cultures of Collaboration