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David Costello @costello-math.bsky.social · 29/08/2026

@theericklee.bsky.social are proposals closed for NS MTA Conference 2026

Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 19/06/2026

"We have created an educational system that is comprised of two mutually exclusive components—what is happening in the classroom and what is being reported through testing…" — David Costello, bit.ly/3JkqjjI #QOTW #profdev #math #numeracy #teaching #learning #education #edusky

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 20/07/2026

Monday tips and tools: take a page from #WhatMissingInMathInstruction, and explore the 4 stages of mathematical problem solving. Find much more in the book… bit.ly/3JkqjjI #profdev #MondayTools #math #numeracy #teaching #learning #education #edusky

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 11/12/2025

Coming soon to your math classroom — #WhatsMissingInMathInstruction from David Costello! 4 shifts to improve students' test scores with simple, meaningful strategies. Check it out: bit.ly/3JkqjjI #booknews #books #profdev #math #numeracy #teaching #learning #education #edusky

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David Costello @costello-math.bsky.social · 07/12/2025

There is a lot of chat about #math instruction and student achievement. Check out this short video about ways to improve student achievement using evidence-based practices. #edusky #maths

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David Costello @costello-math.bsky.social · 01/12/2025

It was great to facilitate a #math session for MK Elementary PD day. Math was only part of the day’s focus. Educators also explored literacy, Mi'kmaw language and culture. Thank you to Kyla for the invitation! ⁦‪@PembrokePublish‬⁩ ⁦‪#edusky

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 28/11/2025

"When I talk with teachers, it does not take long to realize that they are the busiest people in the classroom… However, rarely have I met a teacher who is pleased with how well their students are progressing." — David Costello: bit.ly/4b8emqR #QOTW #profdev #math #numeracy #education #edusky

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David Costello @costello-math.bsky.social · 25/11/2025

Check it out! I have posted new updates to Costello Math website. A math warm-up that is evidence-based & being used across Canada and the USA. Daily Cumulative Review resources for Grades 1-8. Questions for everyday of the school year! Click here costellomath.com/daily-cumula... #edusky #math

costellomath.com

Daily Cumulative Review | Math Warm Up | Costello Math

There are days when teaching and learning feel like two very unrelated activities.We can fix this. Click here to open Costello Math's Daily Cumulative Review.

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David Costello @costello-math.bsky.social · 22/11/2025

Thank you to ⁦‪SCCTM‬⁩ for a fantastic two days of #math. It was great meeting teachers from across South Carolina and exploring ways to strengthen instruction and learning. ⁦‪#education‬⁩ #maths #edusky

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David Costello @costello-math.bsky.social · 21/11/2025

I’m thrilled to be a keynote speaker for this year’s ⁦‪@SCmathteachers‬⁩ Conference. What’s the topic? Exploring 4 instructional shifts that have a great impact on student learning and test scores! #scienceoflearning #math #maths #retrievalpractice #education #edusky

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David Costello @costello-math.bsky.social · 07/11/2025

I had the privilege to talk about #math and the #scienceoflearning with PEI K-9 teachers yesterday afternoon. It is about framing our instruction on how students learn. #education #maths #sol ⁦‪@PembrokePublish‬⁩ ⁦

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David Costello @costello-math.bsky.social · 28/10/2025

What’s Missing In Math Instruction? Teachers cannot just focus on content. Teachers MUST also consider HOW students learn and WHAT this means for instruction! #scienceoflearning #cognitivescience #math #onted @pembrokepublish.bsky.social

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David Costello @costello-math.bsky.social · 25/10/2025

Check it out! Two of my books are in the top 100 for Teaching Math on Amazon.ca Both books are filled with resources and tasks that can immediately be used in the classroom. @PembrokePublish #math

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David Costello @costello-math.bsky.social · 25/10/2025

I’m looking forward to a great day of learning at @researchEDCan. I’m leading two sessions: - Making Math Stick - Fixing Professional Learning Both sessions explore how the science of learning can be leveraged to support instruction and learning. #education #retrievalpractice

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David Costello @costello-math.bsky.social · 24/10/2025

I’m presenting 3 sessions for Manitoba Teachers’ Society (MTS) PD Day. Two sessions for Manitoba Association of Mathematics Teachers. - retrieval practice - problem types The keynote for Manitoba Elementary Teachers’ Association. - science of learning #education #math

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David Costello @costello-math.bsky.social · 14/10/2025

I’m looking for help. In what order do you or your board instruct addition/subtraction fact learning strategies? #NCTMATL25

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David Costello @costello-math.bsky.social · 14/10/2025

I’m looking for help. In what order do you or your board instruct addition/subtraction fact learning strategies? #NCSM2025

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David Costello @costello-math.bsky.social · 25/09/2025

Thank you to ⁦‪Pearson Canada‬⁩ for the sample copies of #Mathology. I was part of the author team for the Grade 9 Practice Workbook. Nice to look through the teacher and student editions. #math ⁦‪#edusky #iteachmath

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David Costello @costello-math.bsky.social · 18/09/2025

In less than one hour I’ll be starting my keynote for ⁦‪@oame_qslma‬⁩ Conference in Kingston, Ontario. We will be exploring the Science of Learning and spiraling curriculum. ⁦‪@oame_qslma‬⁩ ⁦‪@OAMEcounts‬⁩ ⁦‪@PembrokePublish‬⁩ #math #iteachmath #elemmathchat

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David Costello @costello-math.bsky.social · 08/09/2025

Check it out! A math warmup activity that is based on retrieval practice (evidence-based). It only takes 5-8 minutes. Grade 3-8 questions for the school year! Click here costellomath.com/resources/ #elemmathchat #edusky #math

costellomath.com

Resources | Costello Math

RESOURCES

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 06/08/2025

An in-depth understanding of student behavior, including identifying factors that trigger and maintain negative, disruptive actions and attitudes — all in #ManagingStudentBehavior: bit.ly/3UXJnYu #profdev #classroommanagement #teaching #learning #education #edusky

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 05/08/2025

#ManagingStudentBehavior provides an in-depth understanding of how to identify, understand, and defuse challenging classroom situations with ALL your students: bit.ly/3UXJnYu #profdev #behavior #discipline #classroommanagement #teaching #learning #education #edusky

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 01/08/2025

From word problems to open-ended rich tasks to real-world math problems, #MessingAroundWithMath provides a one-stop shop for ready-to-use problems that engage students in a better understanding of key math concepts: bit.ly/4b8emqR #profdev #math #mathematics #numeracy #education #edusky

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David Costello @costello-math.bsky.social · 25/07/2025

I’m looking forward to be facilitating 2 sessions at #PCTM2025 today! We will be exploring mathematical modelling, retrieval practice (Science of Learning) and I will share a resource with over 4000 #math problems. #edusky #mtbos #iteachmath

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 16/06/2025

A one-stop shop of ready-to-use problems that engage students in a better understanding of key math concepts — #MessingAroundWithMath from David Costello: bit.ly/4b8emqR #edchat #profdev #math #mathematics #numeracy #problemsolving #education #edusky

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 28/05/2025

Discover 90 interactive minibooks that support key math concepts and promote independence in young math learners as they learn and grow with #ICanDoMath: bit.ly/3Z0PkFR #edchat #profdev #math #mathematics #numeracy #education #edusky

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David Costello @costello-math.bsky.social · 22/05/2025

I just posted a new Problem of the Week! Prompts for K-3, 4-6 and 7-9. This week’s focus - an open-ended task that focuses on math vocabulary and operations. Click here costellomath.com #edusky #math

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David Costello @costello-math.bsky.social · 18/05/2025

What am I doing before watching tonight’s big hockey game? I’m creating Daily Cumulative Review questions for Grades 3-8 and Problem of the Week tasks for Grades K-8. Both will be posted to my website shortly.

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David Costello @costello-math.bsky.social · 15/05/2025

Check it out!! If you life in the USA, you can now order my #math books from Routledge. Click here to get one of my books that can help you move student learning forward in your class. www.routledge.com/go/pembroke-publishers #mtbos #iteachmath #edusky

routledge.com

Pembroke Publishers

Browse through a collection of practical books for teaching and learning

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David Costello @costello-math.bsky.social · 14/05/2025

My session #CAP2025 starts in 10 minutes. I’ll examine how we need to revise our approach to professional learning and I’ll share an approach we can take to ensure professional learning meets its intended goals. #education ⁦‪#edusky

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David Costello @costello-math.bsky.social · 14/05/2025

I’m thrilled to be at @CdnPrincipals for their annual conference. I’m leading a session on how we can strengthen professional learning by infusing #ScienceofLearning into how we plan, structure and facilitate professional learning. #education #edusky

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Reposted by David Costello

Ms. Watson Wonders @mswatsonwonders.bsky.social · 12/05/2025

David was my last presentation at OAME and made me truly stop and think about what kind of questions I provide students. Then he dropped the ultimate teacher freebie: the New Daily Cumulative Review! I cannot wait to share this incredible resource with my colleagues today! #OAME #scdsb #math

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David Costello @costello-math.bsky.social · 12/05/2025

Are you and your school board familiar with retrieval practice? It is an instructional and learning strategy that makes such a positive difference in terms of student achievement. Check out a short overview about retrieval practice here costellomath.com/retrieval-pr... #edusky

costellomath.com

Retrieval Practice: What You Need to Know for a Successful September Start-Up | Costello Math

Much of this is based/taken from Making Math Stick: Classroom Strategies that Support the Long-Term Understanding of Math Concepts What a year! The 2020-202 ...

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David Costello @costello-math.bsky.social · 09/05/2025

I had the opportunity to attend an #OAME2025 session facilitated by @GLewisOCT. It was fantastic!!

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 08/05/2025

Awesome! We love to see these opportunities for learning<3

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David Costello @costello-math.bsky.social · 08/05/2025

I’m looking forward to chatting #math with educators attending #OAME2025. I’ll be talking about problem solving, metacognition and a literate environment this afternoon.

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 07/05/2025

From word problems to open-ended rich tasks to real-world math problems, #MessingAroundWithMath gives teachers a complete toolbox to use in the classroom. Check it out: bit.ly/4b8emqR #edchat #profdev #math #mathematics #numeracy #problemsolving #teaching #learning #education

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Reposted by David Costello

Pembroke Publishers @pembrokepublish.bsky.social · 05/05/2025

#MessingAroundWithMath: A one-stop shop of ready-to-use problems that engage students in a better understanding of key math concepts — check out the free online preview for a sneak peek: bit.ly/4b8emqR #edchat #profdev #math #mathematics #problemsolving #teaching #learning #education

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David Costello @costello-math.bsky.social · 06/05/2025

Looking for an effective, yet manageable way to review key math concepts? I have just updated Daily Cumulative Review for Grades 3-8! Questions from the first of September through the first week of May! Click here costellomath.com/daily-cumula... #math #mathchat #education

costellomath.com

Daily Cumulative Review | Math Warm Up | Costello Math

There are days when teaching and learning feel like two very unrelated activities.We can fix this. Click here to open Costello Math's Daily Cumulative Review.

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Reposted by David Costello

David Costello @costello-math.bsky.social · 01/05/2025

Check it out! Costello Math is growing! Listen to see what we are working on and how we can support you! #onted #math #maths #mtbos #iteachmath

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David Costello @costello-math.bsky.social · 01/05/2025

Check it out! Costello Math is growing! Listen to see what we are working on and how we can support you! #onted #math #maths #mtbos #iteachmath

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David Costello @costello-math.bsky.social · 22/04/2025

Are you looking for a math routine that Is effective, yet manageable? Do you need a math warmup to review key concepts? Try Daily Cumulative Review. Questions for the whole school year. Click here costellomath.com/daily-cumula... #iteachmath #math

costellomath.com

Daily Cumulative Review | Math Warm Up | Costello Math

There are days when teaching and learning feel like two very unrelated activities.We can fix this. Click here to open Costello Math's Daily Cumulative Review.

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David Costello @costello-math.bsky.social · 08/04/2025

Looking for a way to review key concepts in math. I have just updated Daily Cumulative Review for Grades 3-8. Questions for the full school year! Click here costellomath.com/resources/ #elemmathchat #math #mathchat

costellomath.com

Resources | Costello Math

RESOURCES

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