Math Concepts: Arithmetic, equivalencies Equipment: pencil & paper Grades: K, 1, 2, 3, 4, 5 Common Core: Variable, but especially OA, i.e., 1.OA.C.5, 2.OA.B.2, 3.OA.C.7 Time: 5 – 15 minutes You know the answer. What’s the question? Why We Love Target Number This is a quick check-in that adjusts to the abilities of each student, allows for creativity and arithmetic practice together, and …

## The Power of 37

Topics: Multiplication, patterns, Materials: Pencil & paper Common Core: 4.NBT.1, 4.NBT.5, 5.OA.1, 5.OA.2, 5.NBT.5, MP1, MP2, MP3, MP6, MP7, MP8. How does multiplying by 37 have this strange effect? This problems in multiplication is designed to give students the practice they need once they understand the basic idea of multiplication, with a context to provide motivation and deeper understanding. The …

## Pig

Topics: probability, strategy, addition, estimation Materials: One 6-sided die, pencil and paper Recommended grades: 1, 2, 3, 4, 5, 6 Common Core: For Pig and Big Pig:1.OA.A.1, 1.OA.A.2, 1.NBT.C.4, 2.OA.B.2, 2.NBT.B.5, 2.NBT.B.6, 3.NBT.A.2 For Odd Pig Out: 3.OA.A.3, 3.OA.B.5, 3.OA.C.7 , 4.NBT.B.4,, 4.NBT.B.5, 4.MD.B.4,, 5.NBT.B.5, 5.MD.B.2, 6.SP.A.1, 6.SP.A.2, 6.SP.A.2, 6.SP.B.5 Roll the dice and collect points. You can go as long as …

## Number Talks

Topics: Mental math, numerical fluency; argument & critique Materials: White board or projector Time:5 – 15 minutes Common Core: Variable, but especially MP3 This mental math routine creates powerful positive habits for students. Why We Love Number Talks Number talks don’t replace other instruction, but they are a powerful complement to it. They get all students involved, help them strengthen fluency, intuition, …

## Counterexamples

Topics: logic, deduction, mathematical argument, communication Materials: None Recommended Grades: K, 1, 2, 3, 4, 5, 6, 7, 8 Common Core: Variable, but especially MP3 Proving the teacher wrong. Rigorously. Why We Love Counterexamples Every kid loves to prove the teacher wrong. With Counterexamples, they get to do this in a productive way, and learn appropriate mathematical skepticism and communication …

## Multiplication Table Sums

Topics: Multiplication, summation, patterns and structure Materials: Multiplication table, pencil and paper Grade: 4, 5, 6 Common Core: 4.OA.1, 4.OA.3, 4.OA.5, 4.NBT.5, 5.OA.2, 5.OA.3, 6.RP.1, 6.EE.1, MP1, MP2, MP3, MP6, MP7, MP8. This is a great puzzle for kids who have some comfort with multiplication but still need to deepen their understanding. It gets them looking at the multiplication table …

## Square Building

Topics: Area, multiplication, number patterns , geometry Grade: 3, 4, 5 Materials: Square tiles, graph paper Common Core: 3.MD.5, 3.MD.6, 3.MD.7, 4.OA.1, 4.NBT.5, 4.MD.3, 5.NBT.5, MP1, MP2, MP3, MP5, MP6, MP7, MP8 This lesson is truly foundational. It connects central ideas of arithmetic and geometry, and advances from concrete to pictorial to abstract. It will prove to be a simple analogy …

## 1-2 Nim

Topics: logic, patterns, addition, counting, subtraction, divisibility and remainders (optional) Materials: Counters (tiles, beans, pennies, etc.) or paper and pencil Recommended Grades: K, 1, 2, 3, 4 Common Core: K.CC.A.2, K.CC.B.4, K.CC.B.5, K.OA.A.1, K.OA.A.2, K.OA.A.5, 1.OA.B.4, 1.OA.C.5, 2.OA.B.2, 3.OA.D.9, 3.OA.A.2, 3.OA.A.3, 4.OA.C.5, MP1, MP2, MP3, MP5, MP7, MP8 You can take one or two counters from the pile. How do …

## Don’t Break the Bank!

How to Play Everyone makes a diagram like this on their paper: Whole Class Game: The teacher (or a student) rolls the die. Whatever number it lands on, everyone enters it in one of the nine spots on the board. After nine turns, the board becomes an addition problem with three 3-digit numbers to add together. The goal is to …

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