This is a collection of some of the games and activities that are ideal for running before and after school math circles. This particular book is designed for grades 2-3, though most of the activities would work for older or younger students. The math circles are about enrichment. Our goal is that students will leave them loving math more, and …

## Sum – Memory

Topics: Addition Materials: Cards Recommended grades: K, 1, 2, 3 Common Core: K.OA.A.2, K.OA.A.4, K.OA.A.5, 1.OA.C.6, 2.OA.B.2 Sum-Memory is Memory with a twist: instead of trying to capture identical pairs, players are trying to find pairs that add up to 5, 10, or another target number. Why we love Sum-Memory Sum-Memory is all the fun of memory, but with the …

## Target Number

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 …

## Save Twenty

Materials: Five Dice per game; scratch paper and pencil Topics: Addition, estimation, probability Recommended Grades: 1, 2, 3 Common Core: 1.OA.C.5, 1.OA.C.6, 2.OA.B.2 A quick, fun game for arithmetic practice with numbers up to 20. Why We Love Save Twenty The game is quick and fun, with an element of risk that makes each turn exciting. Lots of estimation and addition practice are …

## 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, …

## Math Games and Movement Breaks

Enjoying these lessons? Join our mailing list now and we’ll send you lesson updates, our 8-page Games to Play at Home packet, all our New York Times puzzles, and much more. Topics: addition, subtraction Materials: none Recommended grades: K, 1, 2, 3, 4 Common Core: K.OA.A.2, K.OA.A.4, K.OA.A.5, 1.OA.C.6, 2.OA.B.2 When kids get antsy, it is time to break out …

## Horseshoes (+/-)

Topics: Addition, subtraction, estimation, comparisons. Materials: Card deck, pencil and paper, white board/document camera. Grades: 2, 3, 4 Common Core: 2.NBT.B.5, 3.NBT.A.2 How close can you get to the target number with the digits provided? Why We Love Horseshoes Horseshoes combines arithmetic practice with complex thinking. Students make their own choices about how to combine the four numbers and get immediate feedback …

## Cuisenaire Rod Lessons

Topics: Addition, subtraction, measurement, skip counting Materials: See specific lessons Recommended Grade: K, 1, 2 Common Core: K.CC.B.4, K.CC.B.5, K.OA.A.1, K.OA.A.2, K.OA.A.3, 1.OA.A.1, 1.OA.A.2, 1.OA.D.7 Overview This series of lessons is meant to introduce Cuisenaire rods in a creative, engaging way, and see how Cuisenaire rods can illuminate and motivate addition, subtraction, and measurement. Why We Love Cuisenaire Rods Cuisenaire rods are …