Here is a list of great resources developed by teachers from the MathTwitterBlogoSphere (MTBoS):

Ambitious Math Instruction

• Teacher Education by Design

Daily Routines and Activities

• Estimation 180 – 180+ days of estimation challenges for students to further develop number sense.
• Would You Rather – A collection of interesting “would you rather” prompts to get students thinking critically in real world contexts.
• Visual Patterns – A collection of visual patterns to stimulate student’s algebraic thinking.
• Number Strings – A collection of cognitively constructed arithmetic practice to foster strategic and flexible thinking.
• Math Arguments 180 – 180+ days of mathematical prompts to get students constructing and critiquing mathematical arguments.
• Graphing Stories – Contextualized practice with graphing and data analysis
• Which One Doesn’t Belong – Thought-provoking puzzles to elicit mathematical conversations.
• Fraction Talks – Simple visuals that foster creative thinking around fractions.

Lessons

• Mathalicious – Real world and contextual interactive lesson plans (Grades 6-12) paid
• Yummy Math – Real world and contextual lesson plans (Grades 3-12) paid
• Robert Kaplinsky – Real world and contextual lesson plans (Grades K-12) free
• Michael Fenton – Real world, problem-based, and Desmos lesson plans (Grades 5-12) free
• Andrew Stadel – Estimation 180 Lessons (Grades 4-8) free
• Graham Fletcher – 3-act Lessons (Grades K-7) free
• More Elementary 3-act Lessons (Grades K-8) free
• Dan Meyer – 3-act Lessons (Grades 3-12) free
• Kyle Pearce – 3-act Lessons (Grades 3-12) free
• Jon Orr – 3-act Lessons (Grades 6-12) free
• Dane Ehlert – 3-act Lessons (Grades 9-12) free

Tasks

• Youcubed – “Low floor, high ceiling” tasks (Grades K-12)
• Illustrative Mathematics – Common Core Aligned tasks (Grades K-12)
• NCTM Illuminations – NCTM and CCSS aligned tasks (Grades K-12)
• NRICH – Non-routine mathematical problems (Grades K-12)
• MAP Assessment Tasks – CCSS aligned performance tasks (Grades 6-12)
• Open Middle – Challenging math problems worth solving (Grades K-12)
• Achieve The Core – CCSS aligned annotated tasks (Grades K-12)
• The Math Forum – Problems of the week (Grades K-12) paid

Blended Learning

• DreamBox Learning
• Front Row
• ST Math
• LearnZillion
• Desmos
• KenKen

Books

• Children’s Mathematics: Cognitively Guided Instruction
• Young Mathematicians At Work
• Making Sense: Teaching and Learning Mathematics with Understanding
• Connecting Arithmetic to Algebra
• Integrating Differentiated Instruction and Understanding by Design
• Accessible Mathematics
• Sensible Mathematics
• What’s Math Got To Do With It?
• Which One Doesn’t Belong: A Shapes Book
• Intentional Talk
• Making Sense of Algebra
• Math on the Move

Other Resources

• Global Math Department – Virtual PD Sessions
• Global Math Department – Newsletter Archives
• Transition to Algebra Project
• Problem Based Learning Starter Kit by Geoff Krall
• 56 Examples of Formative Assessment by David Wees
• How to use 3-Act Lessons by Dan Meyer
• Word Problem Generator by Greg Tang
• Math Munch – A weekly digest of the mathematical internet
• Explore! Math! – A web-based mathematical scavenger hunt by Sam Shah
• Math In Your Feet – A program for learning math through movement and dance
• Learn Desmos – A tutorial for using this free online graphing calculator by Michael Fenton
• Talking Math with Your Kids – A website dedicated to helping parent’s support their children’s mathematical development
• Standards for Mathematical Practice – The Heinemann blog series
• Maths Gems – A weekly collection of five ideas for teaching math(s) by Jo Morgan
• Kids Guide to Money and Finances – Reader submitted resource