Raggedy Ann and Andy
SUBJECT:
2nd Grade Math
TEACHERS:
Andrea Baker
STANDARD:
 2.NBT.5
OBJECTIVE (EXPLICIT):
 TSW subtract numbers using Cuisenaire Rods.
EVIDENCE OF MASTERY (MEASURABLE):
Rubric
SUB-OBJECTIVES, SWBAT (SEQUENCED FROM BASIC TO COMPLEX):

KEY VOCABULARY:
MATERIALS:
subtraction
Cuisenaire Rods
difference
word problems
break apart
centimeter grid paper
crayons
BEFORE
ENGAGE (MAKE CONTENT AND LEARNING RELEVANT TO REAL LIFE AND CONNECT TO
STUDENT INTEREST)
TEACHER WILL: Ask the question, “How
do you subtract to find a missing number?”
“What are the manipulatives you can use to
subtract?”
STUDENT WILL: Answer teacher question.
TEACHER WILL: Pose the following
problem for students to solve. “Raggedy
Ann and her brother Andy have a collection
of stamps. In their collection they have a
total of 24 stamps. Andy’s stamp book has
16 stamps in it. How many stamps are in
Raggedy Ann’s stamp book?”
STUDENT WILL: Listen to word problem.
TEACHER WILL: Model the way to use
Cuisenaire Rods to subtract using a break
apart method. Tell students what each rod
represents. Orange = 10, Blue = 9, Brown =
8, Black = 7, Green = 6, Yellow = 5, Purple
= 4, Lime = 3, Red = 2, White = 1 (Have
this list posted somewhere in your
classroom for students to refer to during
Math class). Using the grid paper we need
to show our whole. Ask students what the
whole is in our word problem. (24) Now we
STUDENT WILL: Give ways to solve the
problem.
STUDENT WILL: Volunteer to show the
numbers using the base ten blocks.
can cover 24 squares using our Cuisenaire
Rods. Have a student come to the front of
the room and place the rods on the
centimeter grid paper. (2 orange, 1 purple).
STUDENT WILL: Students answer teacher
question. Volunteer to place the Cuisenaire
Rods.
TEACHER WILL: Ask the question, “How
would we solve this problem to find out the STUDENT WILL: Answer teacher question.
number of stamps that Raggedy Ann has?”
Students should answer, “Subtract the
stamps that Andy has from the total number
of stamps.”
TEACHER WILL: Have a student volunteer
come to front and place the amount of
stamps the Andy has under the whole. (1
orange, 1 green).
STUDENT WILL: Volunteer to place the
rods.
TEACHER WILL: Ask the question,
“Looking at what we have, can we solve our STUDENT WILL: Answer teacher question.
problem?” Students should say, “Yes cover Volunteer to place rods.
the remaining squares with a rod to find
your answer.” Have student place the
correct rods to solve problem.(8 stamps)
CO-TEACHING STRATEGY IF APPLICABLE
DURING
TEACHER WILL: Explain to students that
they now will solve word problems using
the same strategy. Tell students they will
use their crayons to color in their grip paper
to illustrate each problem they solved.
TEACHER WILL: Pass out the grid paper,
Cuisenaire Rods,and word problem sheet.
(Link for word problem sheet http://www.k5mathteachingresources.com/supportfiles/2ndgrade2stepwordproblems.pdf)
TEACHER WILL: Ask the following
questions:
“What is another way to solve this
problem?”
“Can you work backwards to solve?”
STUDENT WILL: Solve the word problems
using Cuisenaire Rods.
STUDENT WILL: Answer teacher
questions.
“Explain your process to another group.”
AFTER
CO-TEACHING STRATEGY IF APPLICABLE
TEACHER WILL: Ask for student
volunteers to share their mathematical
findings.
STUDENT WILL: Share mathematical
thinking.
CO-TEACHING STRATEGY IF APPLICABLE
Centimeter Grid Paper