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1NBT.2.3 2011 Domain: Number and Operations in Base Ten Cluster: Understand Place Value Standards: Compare two two-digit numbers based on meanings of the tens and ones digit, recording the results of comparisons with the symbols >, =, and <. Essential Questions How can you compare the greater number for any 2 two-digit numbers? Enduring Understandings Place value can be used to compare numbers. Place value can be use to order numbers. Content Statements Numbers can be compared based on the tens and ones digit using the symbols >, =, and <. Activities, Investigation, and Student Experiences Use connecting cubes made into 10 towers, each of the same color, and loose cubes per pair to represent each number. Ex. Use cubes to compare 34 and 43. Use 2 unequal groups of students; ask them to come to the front of the class. Follow by asking the class how many are in each group and what group has more. Ex. Use 21 students (11 is greater than 10; 10 is less than 11). Students can use hundred chart to find the missing number. Assessments Oral Assessment: Ask two students to take a handful of cubes from a container. Assist the class counting the cubes; write the numbers and have the class compare them. Written Assessment: Students can use words (greater than, less than, equal to) or symbols (<, =, and >) to compare numbers. Ex. 23 is less than 43 or 23 < 43 Equipment Needed: Manipulatives such as counters or Teacher Resources: 1NBT.2.3 connecting cubes made into towers, classroom hundred chart, copies of individual incomplete hundred charts. 2011 http://www.aasd.k12.wi.us/staff/boldtkatherine/MathResources_ Primary.htm http://www.ixl.com/math/grade-1/comparing-numbers-up-to100 http://www.box.net/shared/6v377ilja0