In this standard, kindergarteners will learn to count ones and tens to 100 and can identify by reading and writing numbers zero to twenty. Instead of saying there are 1, 2, 3, 4, 5 of something, they know that the last number is the group as a whole (there are five of what has been counted). Another goal of mastery is for children to compare numbers to ten by using the terms more than, less than, and equal to. They also know that 11 is 1 ten and 1 one, 12 is 1 ten and 2 ones, up to nineteen.
Quack and Count by Keith Baker uses rhyming text and playful illustrations to demonstrate the various ways that a group of seven can be created. This book is a useful way for children to connect numbers to objects and the mathematical concept of addition with the concept of comparing numbers.
How will I know my kindergartener has met this Math standard:
My child can count by ones and tens to 100
My child can Read and write numbers 0 to 20
My child can understand that when counting numbers, the last number said tells the number of objects in a group. The number of objects is the same regardless of their arrangement or the order in which they are counted.
My child can compare two written numbers up to ten using more than, less than, and equal to
My child knows that 11 is 1 ten and 1 one, 12 is 1 ten and 2 ones, up to 19
Activites and Multimedia
Point out groups of items in your child’s life---how many trees do you see outside? What are the different ways to group items? How many plates are you putting out for dinner? How many forks? Asking questions like these in a child’s day-to-day life builds their understanding of numerical concepts and gets them ready to comprehend place value. Try this activity from Kindergarten is Crazy.
SC First Grade Standards: Number Sense
The first grade standard for number sense requires children to build on the skills from kindergarten, this time with the goal of counting ones and tens to 120 and by five to 100. Children learn how to identify and understand place value—knowing that “99” is made of 9 tens and 9 ones. Additionally, children understand that two-digit numbers can be grouped in a variety of ways, for example 23 can be made up of 2 tens and 3 ones or 1 ten and 13 ones, etc.
In the book, Two of Everything: a Chinese Folktale, by Lily Toy Hong, a magic pot duplicates anything that is placed inside. The couple who finds the pot begins to duplicate items they need, such as hairpins and coin purses, but soon their duplications get out of control! The concept of doubling is explored thoroughly in this delightful story.
Another book that explores tens, hundreds, and even thousands, is The King’s Commissioners, by Aileen Friedman. Sir Cumference and Lady Di are planning a birthday party for King Arthur, when their plans go awry. Suddenly, the castle is filled with party guests—tens, hundreds, and even thousands. This great book explores counting large numbers in a fun and silly way.
SC First Grade Math Standard: Number Sense: Develop an understanding of the base-ten number system and the importance of “place value.”
How will I know my first grader has met this Math standard:
My child counts by ones and tens to 120 and by fives to 100. Start with any number.
My child understands that a bundle of ten ones is 10.
Understand “place value” up to 99.
My child understands that two-digit numbers can be broken up in several ways.
My child can compare two-digit numbers up to 99 using more than, less than, and equal to. Explain why.
My child can add and subtract by tens up to 100 based on place value. Explain the reason for the answer given.
Activities and Multimedia
Grouping items that represent tens and ones makes counting double-digits more tangible. Counting coins is a great way to practice adding two-digit numbers.