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Curriculum Goal

Primary: Number Sense

• Use place value when describing and representing multi-digit numbers in a variety of ways, including with base ten materials.

Junior: Number Sense

• ​Read, represent, compare, and order decimal numbers up to hundredths, in various contexts.

Context

• Students and teachers will gather either in a physical classroom setting (e.g., in a circle or around a table) or an online video conferencing platform
• Primary students should be familiar with place value for whole numbers while junior students should have experience with place value for decimal numbers.

Materials

In-person version

• One standard 52-card deck with face cards and jokers removed
• A sheet of paper with place values indicated (Appendix A)
Online version
• Video conference capabilities

Lesson

• Demonstrate place values while using the cards as a visual cue; ask students to identify each place value position in the game (Appendix A).
• Draw a card from the deck and ask students to collectively determine what the number would represent in each place value (e.g., 1, 10, 100).
• Explain that the objective of the game is to create a number as close as possible to a target number by considering place values.
• Variations:
• 3-digit numbers
• Deal three cards to each player. Challenge each player to create a number closest to the target number of 500 by using each card to represent a place value.
• 4-digit numbers
• Deal four cards to each player. Challenge each player to create a number closest to the target number of 500 by using each card to represent a place value.
• Use the above target numbers or choose your own.
• Each game consists of five rounds. Players receive one card each round and must decide whether to keep or discard it.
• Keep:
• If the student keeps the card, they may place it in one of the place values (e.g., ones, tens, hundreds, etc.). However, once placed, its place value position cannot be changed.
• Students may choose to discard their card, with a limit of two discards per game
• The student with the number closest to the target number receives three points while the student with the second closest number receives two points.
• Decimal Places (Junior)
• Use decimal target numbers instead of whole number target numbers.
• The student with the number closest to the target number wins, following the same rules as the primary version.

Look Fors

• Are students accurately using the terms “tens,” “hundreds,” “thousands” consistently?
• Are students accurately recognizing the value of the digits in the tens, hundreds and thousands positions?
• Do children understand that zero holds value and that the value is different depending on where the digit lies within the number?
• Are students using different strategies to place their cards in a specific position in order to maximize their chance of winning?
• Do Junior students understand that the decimal separates whole numbers from fractional (or part) numbers?