Leprechaun Traps: Addition Within 100
Common Core State Standards
Math 
Math 
1 
Grade 1 
NBT 
Number & Operations in Base Ten 
C 
Use place value understanding and properties of operations to add and subtract 
4 
Add within 100, including adding a twodigit number and a onedigit number, and adding a twodigit number and a multiple of 10, 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 and explain the reasoning used. Understand that in adding twodigit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten. 
Download Common Core State Standards (PDF 1.2 MB) 
Common Core State Standards
Math 
Math 
Practice 
Mathematical Practice Standards 
MP2 
Reason abstractly and quantitatively. Mathematically proficient students make sense of quantities and their relationships in problem situations. They bring two complementary abilities to bear on problems involving quantitative relationships: the ability to decontextualizeto abstract a given situation and represent it symbolically and manipulate the representing symbols as if they have a life of their own, without necessarily attending to their referents—and the ability to contextualize, to pause as needed during the manipulation process in order to probe into the referents for the symbols involved. Quantitative reasoning entails habits of creating a coherent representation of the problem at hand; considering the units involved; attending to the meaning of quantities, not just how to compute them; and knowing and flexibly using different properties of operations and objects. 
Download Common Core State Standards (PDF 1.2 MB) 
Common Core State Standards
Math 
Math 
Practice 
Mathematical Practice Standards 
MP3 
Construct viable arguments and critique the reasoning of others. Mathematically proficient students understand and use stated assumptions, definitions, and previously established results in constructing arguments. They make conjectures and build a logical progression of statements to explore the truth of their conjectures. They are able to analyze situations by breaking them into cases, and can recognize and use counterexamples. They justify their conclusions, communicate them to others, and respond to the arguments of others. They reason inductively about data, making plausible arguments that take into account the context from which the data arose. Mathematically proficient students are also able to compare the effectiveness of two plausible arguments, distinguish correct logic or reasoning from that which is flawed, andif there is a flaw in an argumentexplain what it is. Elementary students can construct arguments using concrete referents such as objects, drawings, diagrams, and actions. Such arguments can make sense and be correct, even though they are not generalized or made formal until later grades. Later, students learn to determine domains to which an argument applies. Students at all grades can listen or read the arguments of others, decide whether they make sense, and ask useful questions to clarify or improve the arguments. 
Download Common Core State Standards (PDF 1.2 MB) 

Lesson Idea (Common Core)Beyond Fingers: Place Value & the Numbers 1119Grades K2 / Math / ReasoningMath.K.NBT.A.1 / Math.Practice.MP2 / Math.Practice.MP3
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Lesson Idea (Common Core)Leprechaun Traps: Addition Within 100Grades K2 / Math / ReasoningMath.1.NBT.C.4 / Math.Practice.MP2 / Math.Practice.MP3
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Lesson Idea (Common Core)Multiplying Whole Numbers & FractionsGrades 35 / Math / ReasoningMath.4.NF.B.4b / Math.Practice.MP2 / Math.Practice.MP3
 80
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Lesson Idea (Common Core)A Passion for FractionsGrades 35 / Math / ReasoningMath.5.NF.B.4b / Math.Practice.MP2 / Math.Practice.MP3
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Lesson Idea (Common Core)Conjecturing About FunctionsGrades 68 / Math / ReasoningMath.8.F.B.4 / Math.Practice.MP2 / Math.Practice.MP3
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Lesson Idea (Common Core)12 O'Quad High: Trigonometry in FlightGrades 912 / Math / ReasoningMath F.TF.5 / Math.Practice.MP2 / Math.Practice.MP3
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 Lesson Objective
 Use multiple strategies to solve addition problems
 Length
 11 min
 Questions to Consider
 What skills do students develop through the daily math routine?
 How does Ms. Wright encourage students to use multiple strategies?
 What is the effect of using a situational story?
 Common Core Standards
 Math.1.NBT.C.4, Math.Practice.MP2, Math.Practice.MP3
Teacher & School Info

Jeanne Wright
 School Details
 Cypress Creek Elementary School Port Orange, FL
 Population
 764 students
 Student/Teacher Ratio
 14:1
 District Spending
 $8422
Supporting Materials

Leprechaun Traps: Addition Within 100 Transcript

Lesson Plan: Part Part Whole Cards 10 to 18_Part1.PDF
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Lesson Idea (Common Core) Leprechaun Traps: Addition Within 100
Grades K2 / Math / Reasoning