Debug Algorithm
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Partial Sums Addition Lesson
This slideshow will walk students step-by-step through the partial sums algorithm. It’s perfect for first and second graders who have practiced adding with base-ten blocks and are ready to move to a deeper understanding of adding multi-digit numbers without using manipulatives! Make sure your students have a thorough understanding of expanded form prior to using this slideshow.
1st - 3rd
Basic Operations, Math, Place Value
CCSS
2.NBT.A.1
, 2.NBT.A.3
, 2.NBT.B.5
+1
Also included in: Partial Sums Addition Bundle
Number Bonds to Number Sentences: A FREE Activity To Help Make the Transition
Are your students having a hard time making the transition from Number Bonds to Number Sentences (algorithms)? Make the move from number bonds to simple addition and subtraction number sentences a piece of cake with this very visual and classroom-proven method! Whether used in small groups, in a math center, or even with the whole class, 'Number Bonds to Number Sentences' is an awesome tool for helping kids make the connection between graphic and algorithm.
Full, illustrated lesson plans are
K - 2nd
Basic Operations, Math, Other (Math)
Trading Tens: Subtraction with Regrouping (Borrowing) – Hands-On Lesson
Help students finally get subtraction with regrouping by trading tens, not magic borrowing. This complete lesson walks learners from concrete base-ten models to written algorithms, locking in the idea that when you regroup you add 10 to the place that needs more because you take 1 ten from the next place. Perfect for whole-group instruction, small groups, interventions, or sub plans. What’s Included Teacher Notes with objective, key insight, and step-by-step flow Anchor Chart: “What Really
2nd - 5th
Basic Operations, Other (Math), Place Value
2-digit Subtraction on a Number Line PPT Lesson
Using a number line to subtract is a great way to support second graders in using place value strategies rather than jumping directly into the standard algorithm. This powerpoint presentation models how to count back to subtract on a number line. It also shows how to count between to subtract. These two strategies build a strong number sense and understanding of the process of 2-digit subtraction. By the end of the lesson (which can be split over 2-3 days based on student needs), students will b
2nd
Basic Operations, Math
CCSS
2.NBT.B.5
, 2.OA.A.1
Roll-A-Dot-Cube Addition and Subtraction
After teaching multiple strategies for addition and subtraction, have students practice during partner, small group, or individual time!
Strategies I taught previously to having the students practice: standard algorithm with rounding, break apart, place value, number line, etc.
This is a word document, so feel free to change what you need to better suite your class or individual students!
2nd - 5th
Basic Operations, Math, Place Value
CCSS
2.NBT.B.5
, 2.NBT.B.6
, 2.NBT.B.7
+5
Double Digit Addition: With/Without Regrouping: Represent, Expand, Solve Gr. 2
Utilize culture/theme, columns & rows to explicitly teach double-digit addition: without & with regrouping Students will explore the 10-digit system, representing, expanding 2-digit numbers and using the regular algorithm. Puzzles & problem solving included. Charts, graphic organizers and math language incorporated. All on an engaging Indian theme. Integrate learning with great videos available online and "tour" India. Students love it! The material is written to teach itself. See Individual Pr
2nd
Basic Operations, Math
Using Mental Math Strategies to Solve Addition Problems With Larger Numbers
This lesson is intended to be covered over a two-day period with a group of second or third grade students. It could also be used with students who are having difficulty mastering the traditional algorithm for adding larger numbers without and with regrouping. The first part of the lesson covers the adding left to right mental math strategy. The second part of the lesson covers the break apart or decomposing mental math strategy. There is an accompanying worksheet that matches exactly this prese
2nd - 3rd
Basic Operations, Math, Mental Math
CCSS
2.NBT.A.1
, 2.NBT.A.1a
, 2.NBT.A.1b
+4
Strategies for 2-digit Subtraction
This no-prep lesson has four days of subtraction strategies. Each day has a warm-up, number talk, instruction, guided practice, independent problem, and self-reflect. Students will learn to use number lines, expanded form, and the standard algorithm.
1st - 3rd
Basic Operations, Math
CCSS
1.NBT.C.4
, 2.NBT.B.5
, 3.NBT.A.2
Strategies for Adding 2-digit Numbers
This is a powerpoint lesson on "Adding 2-digit Numbers." This can be taught in three separate days. Each day has a warm-up, number talk, strategy, and practice problems. The three strategies are: number lines, expanded form, and standard algorithm.
1st - 3rd
Basic Operations, Math, Numbers
CCSS
2.NBT.B.5
, 2.NBT.B.6
, 2.NBT.B.7
Also included in: Addition Activities and Games
MULTIPLICATION TEACHING POWERPOINT
This is a 53 slide teaching power point that goes through the progression of multiplication. The power point can be split into teaching sessions or can be used by teacher for ideas. The power point begins by looking at groups and sets etc... and ends with written methods such as the grid method and compact algorithms.
1st - 5th
Basic Operations, Mental Math, Numbers
Subtraction FREE Math Activities with Lessons SECOND GRADE
We’ve done your lesson planning for the week! This FREE resource includes 5 days of done-for-you subtraction lessons and activities for second grade! See how easy it can be to plan, prep, and implement effective and engaging math lessons. This FREE resource makes subtraction a piece of cake. It includes lessons on subtraction using number lines, expanded form, and standard algorithm. The interactive instructional PowerPoint is your complete mini-lesson–just project on the board and tea
2nd
Basic Operations, Math
CCSS
2.NBT.B.5
Understanding Multiplication 3.4E, 3.4G, 3.5B (Powerpoint)
Have fun and incorporate technology into your lessons by downloading this entertaining and useful PowerPoint lesson called: Understanding Multiplication. *TEK 3.4E: Use a variety of strategies to solve multiplication problems. *TEK 3.4G: Multiply a 2-digit number by a 1-digit number… *TEK 3.5B: Represent & solve 1 & 2 step multiplication… --------------------------------------------------------------------------------------------------------------- *Some of the slide topics/conversation starters
2nd - 5th
Arithmetic, Basic Operations, Math
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