The Flexibility Formula for K-2nd Grades

Want the missing piece to build your students' Math Fluency?

Registration Opens in Fall 2023
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Join in with thousands of other educators who have helped students become more fluent in math

"After taking this course, I am AMAZED with how many resources/experiences we now have to use. Through this course we have been able to supplement a ton and include games/experiences daily. I desire to provide them with the best experiences possible so that they grow to have a love of numbers and mathematics throughout their lives!"

Chelsea Anderson
Homeschooling Mom

"Just want to thank you for such an amazing course. What a great way to spend money! This is such a wonderful investment. I am sharing with everyone I know and I mean everyone. I feel like I have the missing piece to the math puzzle that I have been trying to solve for some time now. Thanks for that piece."

LeAnn Tisdall
1st Grade Teacher 

"I love the different ways I can have students develop a strong number sense. It's awesome to see the progression of where they should start and how each concept builds on the next one."

Stefanie Berdine
2nd Grade Teacher 


You are ready to change how you teach math and how your students think about math!

  • You have kiddos who have 'learned' the addition strategies, yet still revert back to using their fingers.
  • You are looking for something that will help you with those kiddos who 'just don't get it'. 
  • And you want to do all this and make it FUN!!!

At the end of this course, you will have:

  • A clearly defined progression of what number sense looks like and how it impacts students' fluency with addition and subtraction
  • Peace of Mind in knowing you are heading in the right direction
  • More of a conceptual understanding of the math you teach. If you are like me, you were taught the procedural steps of math but NOT the understanding behind them.
  • More time, because this course will give you pre-made games and parent letters along with lists of activities to help you build number sense for your kiddos…no more endlessly searching on Pinterest and TpT wondering if what you are finding is any good.

The missing piece in math fluency work
is building kids’ flexibility.

Flexibility with numbers is something we cannot directly teach to kids. It comes from the experiences they have with numbers and the connections they see between numbers. The Flexibility Formula helps K-2nd grade teachers learn how to help kids catch flexibility so you can build math minds and not just create calculators.

Clear & Defined Path

Most textbooks do not have number sense built into their program. You will learn the progression of number sense development AND lots of ideas to help you develop your plan of implementation.

Conceptual Understanding

It's hard to teach kids the WHY behind the math if we never learned it ourselves. Let me help you build the connections so that you have the conceptual understandings to help your students understand the WHY behind the procedures.

Love of Teaching Math

For too many educators, math is NOT their favorite subject. If that is you, this course will help you learn to LOVE teaching math.

Meet Christina

{to give you an idea of who I am & my math ed philosophy}

  • I have 4 wonderful children and I thank the Lord that He changed the way I thought about mathematics before they arrived in my life so that I could provide math experiences for them, instead of math flash cards.
  • I call myself a Recovering Traditionalist. I was a very traditional learner and teacher....give me an algorithm and I could solve it....give me any mental math or story problems and I would start sweating.
  • I believe in the power of a positive and growth mindset (for ourselves and our kiddos). Failure is often how we learn our best lessons...yet we try too hard to not let our students fail in class. Feeding them step-by-step directions on how to solve mathematics problems is NOT truly mathematics.
  • My mother was my junior high English teaher and she wood probably have a heart atack if she ever red any thing I put out....well, except for the first book i published (she was my editer). I donut take the time to be gramatically corect and nothin' is ever prefect {I would rather spend my time with my kids than ensure I wrote a complete sentence or speled all the wurds in this paragraf correctly ;).

Course Facilitator
Christina Tondevold with her family

Choose Your Course Enrollment Length

**Enrollment is for one person to access course content. If you need to enroll multiple teachers go here.

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100% Money Back Guarantee

If you go through the course and learn nothing new, I will refund the registration for the course!

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What you'll learn

There are four parts to building students’ flexibility:


In this module we will build our understanding of the 8 Number Sense Concepts that build students' flexibility with numbers...


...then we learn how to observe students to see what concepts they understand and which ones they are still building...


Seeing how the number sense concepts connect together and connect with other math concepts helps determine....


...the experiences you provide students to help them build their flexibility. We will discuss the types of experiences you should provide students and you will get lots that you can use right away with your students...

The Flexibility Formula K-2 provides an opportunity to learn the fundamental mathematical progressions underlying students’ understanding of numbers to build their flexibility when operating with numbers.  Topics will include child cognitive development, early numeracy and number relationships, assessing students’ understanding, and providing mathematical experiences that build students’ flexibility and fluency with math in K-2nd grade.

Specifically, the course will address the following concepts: 

4 Early Numeracy Concepts (Subitizing, Verbal Counting, Object Counting, and Cardinality) and the 4 Number Relationships (Spatial Relationships, One/Two More & Less, Benchmark Numbers, and Part-Part-Whole) 

What You Get With The Course 

What is included in the course

What Educators Say About The Course

Alicia Alves-Erickson
1st Grade, Marsh Creek Elementary

Tracie Murphy
K-12 Special Education
Math Intervention Specialist 

Stefanie Berdine
2nd Grade

Karen Veerhusen-Langerud
Director/Lead Teacher, Grinnell College Preschool

Vandy Reppert
Kindergarten Teacher 

Anna Wood-Cox
Title 1 Math Interventionist


What is the time commitment?

The course has 4 modules. In each module there is approximately 2 hours of instructional time plus the Overview and Bonus content. In total, the course is 10 hours of instructional time. You have access to the course materials for 3 months (or 12 months) from the date the course starts. You are able to watch them at anytime once you enroll.

Can I earn CEUs or Credits?

Each state has different requirements for what they accept for CEUs or Professional Development. So, check to see what is required. I offer a certificate of completion for 15 hours OR you can take the course for professional development credit through an accredited university that we have it set up through, you just need to pay the university their $60 fee for the credit. All participants have the option to take this course for 1 Professional Development Credit (also called Continuing Ed Credits) through an accredited university. We have it set up already through the university and once the course starts you can sign up with them for the credit, you just have to pay them the $60 for the 1 credit.

Do you take Purchase Orders?

If you are an individual teacher who needs to use a PO, use this School Registration. This allows you to register as the participant and have your school billed by invoice which can be paid by check or credit card.

 Is there a group discount?

For groups of 6 or more, $40/person is taken off the registration price. Email me at info@buildmathminds.com to submit a registration for 6 or more teachers. Here is more information on group pricing.

Do you have a syllabus I can show my administration?

Absolutely! For a full syllabus CLICK HERE.  

What if I don't finish in 3 months?

I really want you to finish! I know life is busy...I'm a mom of 4 very active kids. Each week you can expect to spend 1- 2 hours, sometimes more, to watch videos and plan implementing what you learn. I want you to look at your schedule and see if you can commit to 2 hours a week over 4 weeks. You do have 3 months of access to complete the content, but if you don't think you'll have time, then you can register for the 12 month access of the course or there is a way to extend your course access (by becoming a paying member of Build Math Minds) after the 3 month course access ends.

Got Questions?? Call 208-278-2833

Enrollment questions can also be emailed to: info@buildmathminds.com