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
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
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
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
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.
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
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
Costello Math is growing!
Listen to see what we are working on and how we can support you!
#onted #math #maths #mtbos #iteachmath
April 30, 2025 at 11:01 PM
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
Costello Math is growing!
Listen to see what we are working on and how we can support you!
#onted #math #maths #mtbos #iteachmath
I always love attending Reading For The Love Of It Conference. Great conversations about literacy, learning and math.
I’m presenting two sessions on metacognition in math and how we can reframe the traditional question of “Does Your Answer Make Sense?”
#edusky #iteachmath #mtbos #elemmathchat
I’m presenting two sessions on metacognition in math and how we can reframe the traditional question of “Does Your Answer Make Sense?”
#edusky #iteachmath #mtbos #elemmathchat
February 20, 2025 at 3:53 PM
I always love attending Reading For The Love Of It Conference. Great conversations about literacy, learning and math.
I’m presenting two sessions on metacognition in math and how we can reframe the traditional question of “Does Your Answer Make Sense?”
#edusky #iteachmath #mtbos #elemmathchat
I’m presenting two sessions on metacognition in math and how we can reframe the traditional question of “Does Your Answer Make Sense?”
#edusky #iteachmath #mtbos #elemmathchat
Check it out! Making Math Stick is #47 in Math Teaching Materials and #62 in Elementary Education on Amazon!
#mathematics #math #iteachmath #edusky #mtbos
#mathematics #math #iteachmath #edusky #mtbos
January 8, 2025 at 10:14 PM
Check it out! Making Math Stick is #47 in Math Teaching Materials and #62 in Elementary Education on Amazon!
#mathematics #math #iteachmath #edusky #mtbos
#mathematics #math #iteachmath #edusky #mtbos
December 15, 2024 at 9:03 PM
#elemmathchat
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
December 13, 2024 at 2:32 AM
#elemmathchat
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
#elemmathchat
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
December 13, 2024 at 2:24 AM
#elemmathchat
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
#elemmathchat
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
December 13, 2024 at 2:16 AM
#elemmathchat
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
#elemmathchat
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
December 13, 2024 at 2:08 AM
#elemmathchat
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
Welcome to our chat! I'm looking forward to chatting with you!
www.costellomath.com
#mtbos
#iteachmath
