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David Costello

@costello-math.bsky.social

Author of #MessingAroundWithMath, #MathematizingStudentThinking, #MakingMathStick and #usingwhatworks. Principal, Speaker, Workshop Facilitator #math

192 Followers  |  85 Following  |  101 Posts  |  Joined: 25.11.2024  |  1.9143

Latest posts by costello-math.bsky.social on Bluesky

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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 ⁦

07.11.2025 17:22 — 👍 0    🔁 0    💬 0    📌 0

That’s awesome!!

30.10.2025 22:20 — 👍 1    🔁 0    💬 0    📌 0

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

28.10.2025 21:29 — 👍 1    🔁 0    💬 0    📌 0
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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

25.10.2025 16:59 — 👍 0    🔁 0    💬 0    📌 0
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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

25.10.2025 12:03 — 👍 1    🔁 0    💬 0    📌 0
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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

24.10.2025 14:41 — 👍 1    🔁 0    💬 0    📌 0

I’m looking for help.

In what order do you or your board instruct addition/subtraction fact learning strategies?

#NCTMATL25

14.10.2025 22:09 — 👍 0    🔁 0    💬 0    📌 0

I’m looking for help.

In what order do you or your board instruct addition/subtraction fact learning strategies?

#NCSM2025

14.10.2025 22:09 — 👍 0    🔁 0    💬 0    📌 0
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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

24.09.2025 23:05 — 👍 0    🔁 0    💬 0    📌 0
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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

18.09.2025 20:26 — 👍 1    🔁 0    💬 0    📌 0
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Resources | Costello Math RESOURCES

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

08.09.2025 10:06 — 👍 1    🔁 1    💬 0    📌 0
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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

06.08.2025 19:48 — 👍 1    🔁 1    💬 0    📌 0
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#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

05.08.2025 12:37 — 👍 1    🔁 1    💬 0    📌 0
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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

01.08.2025 19:30 — 👍 3    🔁 1    💬 0    📌 0
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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

25.07.2025 13:12 — 👍 2    🔁 0    💬 0    📌 0
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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

16.06.2025 19:36 — 👍 1    🔁 1    💬 0    📌 0
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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

28.05.2025 19:21 — 👍 1    🔁 1    💬 0    📌 0
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Costello Math - Uncover a wealth of knowledge with ease Explore insights on retrieval practice, problem-solving, math literacy, differentiation, curriculum mapping, and year plans.

I have just updated Daily Cumulative Review (a great math warmup activity) and I’ll be adding a new Problem of the Week.

Click here costellomath.com

#edusky #iteachmath #math

26.05.2025 22:52 — 👍 1    🔁 0    💬 0    📌 1

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

22.05.2025 00:26 — 👍 0    🔁 0    💬 0    📌 1
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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.

18.05.2025 20:53 — 👍 1    🔁 0    💬 0    📌 0
Pembroke Publishers Browse through a collection of practical books for teaching and learning

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

15.05.2025 14:34 — 👍 3    🔁 0    💬 0    📌 0
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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

14.05.2025 19:24 — 👍 2    🔁 0    💬 0    📌 0
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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

14.05.2025 13:46 — 👍 3    🔁 1    💬 0    📌 0

Thanks for the shoutout!

Let me know how things go with the resources that I shared!

12.05.2025 23:12 — 👍 0    🔁 0    💬 0    📌 0

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

12.05.2025 11:09 — 👍 2    🔁 1    💬 1    📌 0
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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.

New Daily Cumulative Review questions have been posted for this week.

Addressing #math key concepts from Grades 3-8.

Great warm-up activity.

Click here costellomath.com/daily-cumula...

#mtbos #edusky #education

12.05.2025 10:59 — 👍 3    🔁 0    💬 0    📌 2
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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 ...

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

11.05.2025 23:09 — 👍 0    🔁 0    💬 0    📌 0
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I had the opportunity to attend an #OAME2025 session facilitated by @GLewisOCT. It was fantastic!!

09.05.2025 16:41 — 👍 2    🔁 0    💬 0    📌 0

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

08.05.2025 17:08 — 👍 1    🔁 1    💬 0    📌 0
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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.

08.05.2025 14:08 — 👍 3    🔁 1    💬 0    📌 1

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