Math: Introducing the Place Value System

Unitizing Ten to Introduce the Base Ten Place Value System

• 1.2C  Use objects, pictures, and expanded and standard forms to represent numbers up to 120 [up to 99 in this unit]
  • 1.2A Recognize instantly the quantity of structured arrangements
  • 1.2B  Use concrete and pictorial models to compose and decompose numbers up to 120 [99] in more than one way as so many hundreds, so many tens, and so many ones
  • 1.4A  Identify U.S. coins including pennies, nickels, dimes and quarters by value and describe the relationships between them [up to 99 cents]

Counting Patterns

• 1.5A Recite numbers forward and backward from any given number between 1 and 120

Combinations of 10

• 1.3C compose 10 with two or more addends with and without concrete objects (In preparation for learning the Make Ten strategy in unit 7)

Counting Collections

• 1.5A Recite numbers forward and backward from any given number between 1 and 120
• 1.5B  Skip count by twos, fives, and tens to determine the total number of objects up to 120 in a set;

Measuring Length and Time

• 1.7D  Describe a length to the nearest whole unit using a number and a unit
  • 1.7A  Use [non-standard] measuring tools to measure the length of objects to reinforce the continuous nature of linear measurement
  • 1.7B  Illustrate that the length of an object is the number of same-size units of length that, when laid end-to-end with no gaps or overlaps, reach from one end of the object to the other
  • 1.7C  Measure the same object/distance with units of two different lengths and describe how and why the measurement differ
• 1.7E  Tell time to the hour and half hour using analog and digital clocks