Math Lesson Plan on Comparing Three-Digit Numbers

1. Teacher: Michele .H. Grades: 2nd & 3rd Week of: 10/2-10/6/2017
Standard: 2.NSBT.4, 3.NSBT.4-Compare two numbers with up to three digits using
words and symbols (i.e, <, =, >).
Lesson Objectives/Goals:
Students will be able to compare two three-digit numbers at a time using the >, <, or = signs
to record their answers.
Materials:
 Dry erase board
 Number lines
 Computer with internet access
 Worksheets on comparing numbers
 Pencils and paper
Procedure:
Introduction:
 Give students a short number comparison problem to introduce them to the
lesson. For example: My brother and I went bowling over the weekend. I scored
105 points and he scored 131 points. Ask your students who won and have
them explain their answers (Different word problems will be used throughout the
week).
 Tell students that today they will be learning how to compare three-digit numbers
by using <,>, or = to show their answers.
Teacher Modeling:
 Referring back to the above example, the teacher will share with students how
to write this comparison. Tell them that you would write "105 < 131" because
105 is less than 131. Tell students that you know this because when you
compared the hundreds value of both numbers, they were equal.
 Then moved on to comparing the numbers in the tens place, and found my
brother's number to be larger. Tell students how to prove this same finding on a
number line.
 Draw a number line labeled 100 to 200 with intervals of 10 on the board. Draw a
star approximately where 105 and 131 would fall on the number line. Ask your
students how this shows that 105 is less than 131.

2. Guided Practice/Interactive Modeling:
 Write number lines on the board.
 Give students another short word problem: Sam got $185 for his birthday and Sarah got
$149. Who got more money for their birthday?
 Plot each number on the number line. A star or dot where each number should go on
the number line.
 Students will be asked to check which number is closer to 100, or closer to the left,
because 100 is the smallest number on this line plot.
 Students will be asked who got less money for their birthday. Have them explain.
 Show students how to write the comparisons sentence on the blank lines. For example:
185 > 149.
 Ask students to justify this answer.
 Give students two numbers, 330 and 705, and ask them to use the number line to
compare them. Advise students to number the dash marks on the number line before
completing the problem.
 Have students work in pairs to complete this task.
 Ask a group to come up to the board and explain to the class how they labeled the
number line, where they put the points, and what symbol they included in their final
answer. Ask another group to either explain why they agree or disagree with the first
group's answer.
Independent Practice:
 Give students the number pairs 250 and 295 and 784 and 725 to compare.
 Have students use the number lines to compare these numbers on their own.
 Remind students to label their number line first, then add the points, and then write the
correct comparison symbol.
 Introduce and explain and students will complete a worksheet on comparing
three digit numbers using a number line. Students will log on to
www.khanacademy.org/search?referer=%2Fcoach%2Fdashboard&page_search
_query=comparing+three-digit+numbers continue to practice comparing three-
digit numbers.
Reflection/Closure:
 Ask students to give a final summary of the lesson. Remind them to include plotting
points on a number line, figuring out which number is greater, and which each of the
comparison symbols represent.
Assessment:
 Observation and student work samples from independent practice.

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