Reflection: Vertical Alignment Numbers 20 to 25 - Section 3: Practice


Leaving Kindergarten, students need to have a flexible understanding of "number". For example, that ten can be created by five plus five more, as well as by six and four more. Also, that ten can be made by taking some away. 

They need to be growing their mathematical communication skills, with an understanding that their thinking is as critical as "the answer". Kinders should be accustomed to working alongside peers, and comfortable with explaining their thinking to others using words, pictures, fingers, and other representations. 

When leaving kindergarten, students should have had extensive practice with subitizing  -- the instant recognition of relatively small quantities. This is an important step in the development of number sense, and the skills of addition and subtraction.

Mathematics Learning in Early Childhood (National Research Council 2009), has broken down the Common Addition and Subtraction Situations, to show the progression of mathematical thinking.

 This is a very helpful document for kindergarten, first, and second grade teachers because it allows us to align our curriculum vertically, and to make sure we have no gaps in the growth of these different situation of addition and subtraction.

  Critical K Understandings
  Vertical Alignment: Critical K Understandings
Loading resource...

Numbers 20 to 25

Unit 9: Numbers to 100
Lesson 2 of 8

Objective: Students will be able to count to 25 and recognize numbers up to 25.

Big Idea: Numbers don't stop at 20! We spend the last week or so of school looking at the numbers beyond 20. Today we do it through a story.

  Print Lesson
1 teacher likes this lesson
crayon counting book
Similar Lessons
Kindergarten Math » Count & Compare
Big Idea: Kindergarteners need to learn how to compare quantities. This lesson makes it personal and fun for the kids to grasp. It is an introductory level lesson.
Phoenix, AZ
Environment: Urban
Dawn Gunn
Calendar Routine
Kindergarten Math » First Week of Kindergarten
Big Idea: This lesson highlights my calendar routine. Calendar time incorporates many math concepts, and is completed daily outside of my math block.
Sterling Heights, MI
Environment: Suburban
Cassandra Joss
I Am Five! Exploring the Number Five
Kindergarten Math » Exploring Numbers 0-10
Big Idea: Many kindergarteners come to school with rote counting skills, but they often do not understand that the numbers they can recite actually represent quantities. This lesson helps to make that connection.
Cold Spring, MN
Environment: Rural
Joyce Baumann
Something went wrong. See details for more info
Nothing to upload