David Costello
@costello-math.bsky.social
Author of #MessingAroundWithMath, #MathematizingStudentThinking, #MakingMathStick and #usingwhatworks. Principal, Speaker, Workshop Facilitator #math
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
It is about framing our instruction on how students learn.
#education #maths #sol @PembrokePublish
November 7, 2025 at 5:22 PM
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
It is about framing our instruction on how students learn.
#education #maths #sol @PembrokePublish
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
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
October 28, 2025 at 9:29 PM
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
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
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
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
October 25, 2025 at 12:03 PM
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
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
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
Two sessions for Manitoba Association of Mathematics Teachers.
- retrieval practice
- problem types
The keynote for Manitoba Elementary Teachers’ Association.
- science of learning
#education #math
October 24, 2025 at 2:41 PM
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
Two sessions for Manitoba Association of Mathematics Teachers.
- retrieval practice
- problem types
The keynote for Manitoba Elementary Teachers’ Association.
- science of learning
#education #math
I’m looking for help.
In what order do you or your board instruct addition/subtraction fact learning strategies?
#NCTMATL25
In what order do you or your board instruct addition/subtraction fact learning strategies?
#NCTMATL25
October 14, 2025 at 10:09 PM
I’m looking for help.
In what order do you or your board instruct addition/subtraction fact learning strategies?
#NCTMATL25
In what order do you or your board instruct addition/subtraction fact learning strategies?
#NCTMATL25
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
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
September 24, 2025 at 11:05 PM
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
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
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
We will be exploring the Science of Learning and spiraling curriculum.
@oame_qslma @OAMEcounts @PembrokePublish #math #iteachmath #elemmathchat
September 18, 2025 at 8:27 PM
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
We will be exploring the Science of Learning and spiraling curriculum.
@oame_qslma @OAMEcounts @PembrokePublish #math #iteachmath #elemmathchat
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
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
Resources | Costello Math
RESOURCES
costellomath.com
September 8, 2025 at 10:06 AM
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
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
Reposted by David Costello
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
#profdev #classroommanagement #teaching #learning #education #edusky
August 6, 2025 at 7:48 PM
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
#profdev #classroommanagement #teaching #learning #education #edusky
Reposted by David Costello
#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
#profdev #behavior #discipline #classroommanagement #teaching #learning #education #edusky
August 5, 2025 at 12:37 PM
#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
#profdev #behavior #discipline #classroommanagement #teaching #learning #education #edusky
Reposted by David Costello
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
#profdev #math #mathematics #numeracy #education #edusky
August 1, 2025 at 7:30 PM
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
#profdev #math #mathematics #numeracy #education #edusky
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
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
July 25, 2025 at 1:13 PM
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
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
Reposted by David Costello
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
#edchat #profdev #math #mathematics #numeracy #problemsolving #education #edusky
June 16, 2025 at 7:36 PM
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
#edchat #profdev #math #mathematics #numeracy #problemsolving #education #edusky
Reposted by David Costello
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
#edchat #profdev #math #mathematics #numeracy #education #edusky
May 28, 2025 at 7:21 PM
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
#edchat #profdev #math #mathematics #numeracy #education #edusky
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
Click here costellomath.com
#edusky #iteachmath #math
Costello Math - Uncover a wealth of knowledge with ease
Explore insights on retrieval practice, problem-solving, math literacy, differentiation, curriculum mapping, and year plans.
costellomath.com
May 26, 2025 at 10:52 PM
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
Click here costellomath.com
#edusky #iteachmath #math
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
This week’s focus - an open-ended task that focuses on math vocabulary and operations.
Click here costellomath.com
#edusky #math
www.co
May 22, 2025 at 12:26 AM
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
This week’s focus - an open-ended task that focuses on math vocabulary and operations.
Click here costellomath.com
#edusky #math
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.
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.
May 18, 2025 at 8:54 PM
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.
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.
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
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
Pembroke Publishers
Browse through a collection of practical books for teaching and learning
www.routledge.com
May 15, 2025 at 2:34 PM
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
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
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
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
May 14, 2025 at 7:24 PM
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
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
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
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
May 14, 2025 at 1:46 PM
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
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
Reposted by David Costello
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
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
Addressing #math key concepts from Grades 3-8.
Great warm-up activity.
Click here costellomath.com/daily-cumula...
#mtbos #edusky #education
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.
costellomath.com
May 12, 2025 at 11:09 AM
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
Addressing #math key concepts from Grades 3-8.
Great warm-up activity.
Click here costellomath.com/daily-cumula...
#mtbos #edusky #education
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.
costellomath.com
May 12, 2025 at 10:59 AM
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
Addressing #math key concepts from Grades 3-8.
Great warm-up activity.
Click here costellomath.com/daily-cumula...
#mtbos #edusky #education
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
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
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 ...
costellomath.com
May 11, 2025 at 11:09 PM
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
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