~ Gateway Regional School District~
Unit Plan
(revised 2/15/13)
Content Area: Go Math!
Unit: 3-Digit Addition and Subtraction
Grade(s): 2
Time Line: 17 days
Date: January
Domain/Content Standard(s): Numbers and Operations in Base Ten
Stage 1: Desired Results
Established Goals: Use place value understanding and properties of operations to add and subtract.
CC.2.NBT.7 Add and subtract within 1000, using concrete models or drawings
and strategies based on place value, properties of operations, and/or
the relationship between addition and subtraction; relate the strategy
to a written method. Understand that in adding or subtracting three digit
numbers, one adds or subtracts hundreds and hundreds, tens
and tens, ones and ones; and sometimes it is necessary to compose or
decompose tens or hundreds.
Transfer:
Students will be able to:
Draw quick pictures to represent 3-digit addition.
Apply place value concepts when using a break apart strategy for 3-digit addition.
Record 3-digit addition using the standard algorithm with possible regrouping of ones.
Record 3-digit addition using the standard algorithm with possible regrouping of tens.
Record 3-digit addition using the standard algorithm with possible regrouping of both ones and tens.
Solve problems involving 3-digit subtraction by using the strategy make a model.
Record 3-digit subtraction using the standard algorithm with possible regrouping of tens.
Record 3-digit subtraction using the standard algorithm with possible regrouping of hundreds.
Record 3-digit subtraction using the standard algorithm with possible regrouping of both hundreds and
tens.
Record subtraction using the standard algorithm when there are zeros in the minuend.
COMMON CORE CC.3.OA.1 Also CC.3.OA.3, CC.3.OA.7, CC.3.NBT.2 Meaning:
Students will understand that:
They can draw pictures to add two 3-digit numbers.
They can add two 3-digit numbers by breaking apart a number into hundreds, tens, and ones.
They need to know when to regroup ones while adding.
They need to know when to regroup tens while adding.
They need to know when to regroup tens and ones while adding.
Making a model can help them solve subtraction problems.
They need to know when to regroup tens while subtracting.
They need to know when to regroup hundreds while subtracting.
They need to know when to regroup hundreds and tens while subtracting.
They can still regroup when there is a zero in the minuend.
Essential Question:
What are some strategies for adding and subtracting 3-digit numbers.
Acquisition:
Students will know…
How to add and subtract two 3-digit numbers with regrouping.
Students will be skilled at…
Knowing when and how to regroup in addition and subtraction of 3-digit numbers using the standard
algorithm format.
Vocabulary/factual knowledge: addends, difference, hundred, regroup, sum
Stage 2: Evidence
Assessment/Evidence of Learning:
levels
(Curriculum embedded performance assessment)
Mid Chapter Checkpoint
Chapter 6Test
examples/blooms
Performance tasks
Embedded differentiated performance activities included in the curriculum
Other evidence:
Teacher observations
Stage 3: Learning Plan
Summary of:
Learning activities, strategies for instruction (include remediation and enrichment
opportunities/differentiated instruction)
6.1 Students will draw quick pictures to represent 3-digit addition.
6.2 Students will apply place value concepts when using a break apart strategy for 3-digit addition.
6.3 Students will record 3-digit addition using the standard algorithm with possible regrouping of ones.
6.4 Students will record 3-digit addition using the standard algorithm with possible regrouping of tens.
6.5 Students will record 3-digit addition using the standard algorithm with possible regrouping of both
ones and tens.
6.6 Students will solve problems involving 3-digit subtraction by using the strategy make a model.
6.7 Students will record 3-digit subtraction using the standard algorithm with possible regrouping of
tens.
6.8 Students will record 3-digit subtraction using the standard algorithm with possible regrouping of
hundreds.
6.9 Students will record 3-digit subtraction using the standard algorithm with possible regrouping of
both hundreds and tens.
6.10 Students will record subtraction using the standard algorithm when there are zeros in the minuend.
Problem Based Learning Activity:
None
Blooms Level
Instructional Tools, Resources, 21st Century Skill(s) Component
Go Math! Curriculum: Teacher’s Edition, Student Edition, iTools, Grab and Go, Mega Math, Animated Math Models,
Destination Math, Smart Board, iPads, Math Manipulatives as noted in Teacher’s Edition
Stage 4: Reflection
Unit Outcome:
Notes for changes: