Developmental Math Group

02/16/2025

08/27/2020

In home Math kits for Kindergarten, Grade One and Grade Two
https://www.developmentalmathgroup.com/collections/in-home-math-kits-for-kindergarten-grade-one-and-grade-two
These kits will provide you with activities and most of the materials that you will need to help your child with math for the school year. Each book contains activities for the essential concepts that need to be learned during that school year. There are blackline masters that can printed from the internet.

07/30/2020

Want some help with math lessons for kindergarten, first grade or second grade kids. Order the activity books for use. All essential concepts are covered from number concepts, operations, geometry, measurement and data.
Go to developmentalmathgroup.com for more information.

02/28/2020

Bears and Chairs are even more fun with pizza tables found in the boxes.

09/18/2019

Counting is essential when students are doing math. I talked about both counting aloud and counting objects. Now let’s talk about the five counting principles that need to be in place for children to move on.
1. Children need to have a stable counting order. This means counting aloud accurately without pauses. Pausing and errors need to be addressed.
2. Children need to have one-to-one correspondence. This means tagging (giving a number word to each object) once and tagging all objects.
3. Children need to have Cardinality. This means understanding that the last number word said represents the total amount. Children without Cardinality will think that each object has its own name. For example, a child may count three objects (one, two, three) but when asked to give three picks up the third object because it is named three.
4. Children need to understand that any kind of objects can be counted. The objects do not need to be the same color, shape or size.
5. Children need to be able to count objects in any configuration as long as each item is counted once and only once.

09/11/2019

After you know how far each student can count, it is time to find out if they can count objects and how it is done (counting plan).
To begin, the youngest children do best if the objects to be counted are placed in a row. That way each object can be touched (tagged) and a number word said for each object.
As the number of objects gets larger, two types of counting should be checked (counting a set and counting out a set).
Counting a set means to place objects in a pile and have the student count. Watch to see if there is a plan for counting (moving objects from the uncounted pile to a counted pile).
Counting out a set means to place objects in a pile and ask the student to count out a specific number less than the amount in the pile. This is more difficult because the student must remember the number asked for and stop the count when the number is reached.
If you are not finding out where each student is in understanding of math are you meeting each at their level?
Go to developmentalmathgroup.com for materials to help.

Math materials to support students pre-kindergarten, kindergarten, grade 1 and grade 2.Developmental Math Assessment used for planning.

09/06/2019

Check to see where each of your students can count to. Not with objects but just by saying the words. If a child can only count to 10 why would we ask them to add 6 and 6? Having the correct sequence and names for numbers comes first. We expect children coming into kindergarten to be able to count to 20. The words for the numbers 11 to 19 are very difficult to learn. Many Asian countries have words that match the meaning. For example, er is two and shi is ten so shi er is twelve or ten and two. Er shi er is 22 or two ten two. No wonder the USA is behind when we are asking our youngest children to say the numbers 11 to 19 without the meaning of the amount.

09/04/2019

The school year has started. Do you know where your students are in their understanding of math? It is important to spend the beginning of the year assessing so you know where to begin. The DMA for pre-K, kindergarten, grade one, grade two readiness are available. Go to

Math materials to support students pre-kindergarten, kindergarten, grade 1 and grade 2.Developmental Math Assessment used for planning.

06/19/2019

First grader going into grade two learning how to measure with feet and inches making sure to leave no gaps.

06/15/2019

Three year old matching a bear to a chair. His mom said he. Was engaged for 30 minutes. Does your little one have Bears and Chairs? If not, go to www.developmentalmathgroup.com.

12/14/2017

Three year old.
Bears and Chairs + play mat = imagination, counting and learning
Don’t wait get for a fun learning gift for 2-6 year olds. Go to developmentalmathgroup.com

04/20/2017

Debra and I are excited that we now have available Activity Books for Kindergarten, Grade One and Grade Two. The prices are $69.99, 79.99 and $89.99. Each book contains instructional activities, practice activities and formative assessments for Number Concepts, Operations, Geometry and Measurement &Data. A comprehensive book for teachers and parents. Blacklines are online for downloading.