Need more information? How to implement number talks document and Number Talk “Look Fors” p.10
Different models to show one strategy: "use a friendly number"
Number Talks: Helping Children Build Mental Math and Computation Strategies, Grades K-5 by Sherry Parrish (all schools should have at least one copy of this book) PDFs and JAMBOARDS for Number Talks here
Math Flip Cards- like mini number talks on printable cards and Google Slides. More info on Berkeley Everett's website .