In this unit, students will extend their work with the counting sequence by counting forward beginning from a given number. Students will expand their knowledge of numbers to include representing the number of objects in writing up to 20. Students will deepen their understanding of onetoone correspondence by counting to tell the number of objects. Students need to develop a system for ensuring they have counted each object and for keeping track of the objects that have already been counted.
Key Concepts:
 The number sequence remains the same regardless of the starting number (up to 50 in this unit).
 Any number (within 20) of objects can be represented with a written numeral.
 The number of objects arranged in a line, rectangular array, or circle is the same no matter how it is counted.
Prior Knowledge Needed:
 Rote counting and understanding amount counted (Grade K, Unit 1; K.CC.A.1).
 Understanding that each item in a collection must be counted once and only once (Unit 1; K.CC).
 Ability to count up to 10 objects accurately (Grade K, Unit 2; K.CC.B.4a).
 Knowledge that any number of objects can be represented with a written numeral (Grade K, Unit 2, KK.CC.A.3).
 Counting ability to answer “how many?” questions about things arranged in a line or rectangular array (Grade K, Unit 3, K.CC.B.5).
Units on the Horizon:
 Matching and counting strategies can be used to compare quantities (up to ten) of two groups (Grade K, Unit 9, K.CC.C.6).
 Number sequence remains the same regardless of the starting number (Grade K, Unit 13, K.CC.A.2).
Lessons

Lesson objective: Understand that we can begin counting at a number other than one within a known counting sequence. Students bring prior knowledge of number names and the count sequence from K.CC.A.1. This prior knowledge is extended to counting forwar...

Lesson objective: Count from a number other than one. This lesson helps to build fluency with rote counting from a number other than one (up to 50). A number chart is used here because it supports the student in remembering the counting sequence. This w...

Lesson objective: Any number of objects (within 20) can be represented with a written numeral. Students bring prior knowledge of writing numbers to represent an amount from zero to ten from Kindergarten Unit Two. This prior knowledge is extended to numb...

Lesson objective: Count any number of objects (within 20) and represent the objects with a written numeral. This lesson helps to build fluency with writing numbers from 0 to 20 and representing a number of objects with a written numeral. Number racks ar...

Lesson objective: Count any number of objects (within 20) and represent the objects with a written numeral. This lesson helps to build fluency with writing numbers from 0 to 20 and representing a number of objects with a written numeral. Dot cards are u...

Lesson objective: Apply the understanding that any number of objects can be represented with a written numeral. This lesson provides an opportunity for students to apply their knowledge and understanding of written numerals to a reallife situation. Stu...

Lesson objective: Understand that the number of objects arranged in a line, array, or circle, is the same no matter how it is counted. Students bring prior knowledge of the relationship between numbers and quantities by connecting counting to cardinalit...

Lesson objective: Understand that the amount remains the same even when objects are counted in different ways. Students bring prior knowledge of counting from K.CC.B.4 and K.CC.B.5. This prior knowledge is extended to counting objects in irregular arran...

Lesson objective: Count dot card arrangements accurately and build the same amount on a double ten frame. This lesson helps to build fluency with accurately counting dot card arrangements and representing that same amount with counters on ten frames. Th...

Lesson objective: Students extend their understanding of counting to 20. Given a number 120, students will accurately count out that many objects, and write the corresponding numeral. Students understand that they can count the same quantity in differe...