The 120’s chart is also a great tool for practicing number sense, place value, and expanded form. When students place numbers on the 120’s chart, they are learning to notice patterns on the 120s chart. Throughout the first semester, this is a continuous center in our math rotations. As students become faster in completing the chart (many times it initially takes 25-30 minutes to complete the chart, while only 10-12 minutes when they have mastered the patterns/skill). Students ‘level-up’ as they work with the chart.
Initially I only use the number cards (1-120) for all 3 of my math groups. Students pull a number and then, place it in its home. Many students will individually count each square on the 120s chart until they find the desired home. Eventually, students will discover ‘tricks’ for finding the number’s home – counting by tens, noticing the number’s relationship to other numbers in the 120s chart, etc.
After students are successful using the number cards, I introduce the Place Value cards. These place value cards are perfect for practice counting tens and ones. Next, I introduce the tens/ones cards for the numbers (1 ten 8 ones). Finally, students use the expanded form of each number to place it on the chart (30 + 8).
We’re also using Place Value Path by The Measured Mama in centers. She has already included 3 differentiated board games, so it’s perfect for all my math groups. I copy the boards on different colors of card stock (yellow, blue, green) and they are ready to go!
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