• Topics covered in Unit 2: Number and Quantity


    bar graph

    1. I can recognize numbers 1 through 10.
    2. I show a 1-1 correspondence.
    3. I can rote count.
    • Four-year-olds can rote count up to 20, although they may often skip a number or say one out of order. The numbers 11–20 are not as intuitive to children since they don’t follow a discernible pattern. 


      1. playing hide and seek, counts aloud

      2. fills in the next number when a teacher says, "4, 5, 6…"

    • One-to-one correspondence means understanding that each object in a set gets only one count. Children learn 1:1 by touching each item and saying the corresponding number aloud. With continued practice and repetition, four-year-olds learn to count up to ten objects and understand that the last number named in the collection represents the last object as well as the total number of objects. 


      1. points to each plastic frog and assigns the appropriate number to it

      2. lines up 10 rocks and counts them using 1:1

      3. Point at each goldfish or pretzel stick and count them

    • Four-year-olds can incorporate counting and numbers in their play. They will act out stories involving numbers and are able to use counting skills to figure out how many items they have. 


      1. counts how many baby dolls there are to determine how many bottles are needed

      2. counts how many children are in a center at one time

      3. counts how many bugs are on the playground

      4. counts how many blocks they used to build a tower

    • Graphing provides an opportunity for children to represent and communicate mathematical relationships, such as more/less. It is important for teachers to create graphs regularly. After the data has been collected, four-year-olds can interpret the data to find out what it tells you. They will be able to say things such as “Five people like turtles and two people like snakes.”


    1. votes on three names to determine what to call the class pet

    2. determines using graph if "more" or "less" children think grass will grow in soil compared to damp sponge

    3. votes on the type of pizza she likes the most

    • Four-year-olds develop number knowledge beginning with 1–5 objects and move up to 10 as ready. They can recognize and identify numerals 0-5. They are beginning to understand that the last number counted represents the number of objects in that set and they can match a numeral to that set. 


      1. places items into containers labeled with numerals (muffin tin with each space assigned a numeral, child places appropriate number of items in each space)

      2. looks at numeral on spinner and moves that number of spaces on gameboard

      3. Roll the dice and count that number of objects or connect that numbers of cubes/Lego's, etc.