Endnotes
1. Heather C.Hill, et al. "Unpacking Pedagogical Content Knowledge: Conceptualizing and Measuring Teachers' Topic-Specific Knowledge of Students."
2. Mitchell Lansberg. "In L.A., Singapore Math has Added Value"
3. Elizabeth Witt, Principal Editor .What the United States Can Learn from Singapore's World-Class Mathematics System (and what Singapore can learn from the United States): An Exploratory Study,
4. Singapore Primary Mathematics, 1A.
5. Mitchell Lansberg. "In L.A., Singapore Math has Added Value
6. Liping Ma. Knowing and Teaching Elementary Mathematics: Teachers' Understanding of Fundamental Mathematics in China and the United States., 9-10.
7. Roger Howe, Taking Place Value Seriously: Arithmetic, Estimation and Algebra.
Comments: