## Reflection: Intervention and Extension Comparing Things! - Section 1: Anticipatory Setting

#### I notice several students had a hard time figuring out what symbol to use.  To give students the time they need to become proficient, I ask them to move to their assigned groups. I explain that they will use symbols to write if a number is greater than, less than, or equal to another number. I give them a set of two- and three-digit numbers I created using index cards. As students work, I circle the room and remind them of the purpose of the lesson.  For instance, I may point to a symbol and ask them to state the meaning of the symbols they choose, and demonstrate the correct way to represent it when comparing numbers.

Some students could not communicate how or why they chose symbols, or the value of the number they were comparing. I pull those students in a smaller setting. I place a number card and a set of base-tens on the desk and ask students to use the base-tens to represent the given number. I place a second number card on the desk, and ask students to represent that number using base-tens. I ask students to point to the first number card, and say the number out loud. I ask them to tell me the number in the tens place. (7) Check your base-ten model, how many ten rods should you have? (7) Now, tell me the number in the ones place. (5) How many ones should you have? (5) I proceed to the next number repeating the questions above. (8 tens and 9 ones) I ask students to compare the ten rods in the first number to the ten rods in the second number. How many ten rods do you have for the first number? (7) How many ten rods to you have for the second number? (8) Who can tell me which number has more ten rods? (89) You are exactly right! Now, look at your Cookie Monster notes. Which number is greater/lessor? Students are able to determine which number is greater and which number is lessor because they have a visual representation. From this point I will go back over the greater-than, less-than, and equal-to symbols so that they can gain a deeper understanding.

Need to Know!
Intervention and Extension: Need to Know!

# Comparing Things!

Unit 1: Numbers & Operation in Base Ten Grade 2
Lesson 1 of 10

## Big Idea: Students explore numbers in a variety of ways to understand how to compare three-digit numbers based on an understanding of place value.

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50 minutes

### Carol Redfield

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