In no particular order, these resources are great for teaching mathematics.
Good Questions for Math Teaching K-6
Good Questions for Math Teaching 5-8
Good Questions: Great Ways to Differentiate Mathematics
Good Questions: Great Ways to Differentiate Secondary Mathematics
5 Practices for Orchestrating Productive Mathematics Discussions
Elementary and Middle School Mathematics: Teaching Developmentally
Higher Level Thinking Questions: Mathematics
Principles to Action: Ensuring Mathematical Success for All
Number Talks
Minds on Mathematics: Using Math Workshop to Develop Deep Understanding in Grades 4-8
Teaching Student Centered Mathematics PreK-2
Teaching Student Centered Mathematics 3-5
Teaching Student Centered Mathematics 6-8
Good Questions for Math Teaching K-6
Good Questions for Math Teaching 5-8
Good Questions: Great Ways to Differentiate Mathematics
Good Questions: Great Ways to Differentiate Secondary Mathematics
5 Practices for Orchestrating Productive Mathematics Discussions
Elementary and Middle School Mathematics: Teaching Developmentally
Higher Level Thinking Questions: Mathematics
Principles to Action: Ensuring Mathematical Success for All
Number Talks
Minds on Mathematics: Using Math Workshop to Develop Deep Understanding in Grades 4-8
Teaching Student Centered Mathematics PreK-2
Teaching Student Centered Mathematics 3-5
Teaching Student Centered Mathematics 6-8