Provide each student with ten counters. Ask the students to count their collections. As the students start counting each item one at a time, stop them. Remind them that subitizing could help them to count their collections more quickly. Encourage the students to rearrange their counters so that they are easier to count.
After identifying how many counters they have, invite volunteers to share with the class how they arranged their counters. Demonstrate some of the examples on the board. As a class, decide which arrangement is the quickest way to subitize and count a collection of ten.
As a class, complete the activity on slide 10. Check the answers on slide 11.
Display and discuss slide 12. Place the students into pairs. Provide each pair with a pre-cut and laminated copy of the Subitizing 1 to 12 Domino Cards. Ask the students to use the cards to connect the dominoes by matching the numerals to the dots, then sequence the cards from smallest to largest.
Monitor and support the students as they complete the task. Once they have finished, sit as a class in a circle on the floor. Place a set of the cards in the middle of the circle and invite the students to match a numeral card to its domino card. Repeat the process until all the cards have been matched up.
Place the students into small groups. Provide each group with a copy of the Subitizing Leap Frog Game. Ask the students to use their knowledge of subitizing to match the dots on the dice with the dots on the game board to make their way from start to finish.
Suggested Assessment Strategies
used strategic whole class or individual questioning
observed student participation during learning activities