Fundamental Math Skill:
 Recognizing and applying understanding of number properties: Understanding how numbers behave in operations and drawing on that understanding to master math facts and perform calculations.
– Focusing on the Fundamentals of Math – A Teacher’s Guide, p.2
Video Selections
These curated videos have been selected to prompt further thinking about the selection from the Teachers Guide to the Fundamentals of Math posted above.
Thinking About Number PropertiesRecognizing And Understanding EqualityRecognizing And Understanding Commutative Property
What is numeracy? (5:42)
From "Leaders in Educational Thought K12"
Generalizations (3:52)
From "Leaders in Educational Thought: Special Edition on Mathematics (2013)"
Text Resources
This curated list of documents have been selected to help you gain a deeper understanding of the above selection from “Focusing on the Fundamentals of Math – A Teachers Guide”. Each link will take you directly to the relevant section within the document.
A Guide to Effective Instruction in Mathematics Gr. 13 Number Sense and Numeration 

A Guide to Effective Instruction in Mathematics, Gr. K6, Number Sense and Numeration Vol 1, The Big Ideas 

Paying Attention to Algebraic Reasoning 

The Mathematical Territory Between Direct Modelling and Proficiency, What Works 

A Guide to Effective Instruction in Mathematics K6, Vol 5, Teaching Basic Facts and Multidigit Computations 