The Problems of the Month are organized below by grade level and main topic for that level. These grade‐level expectations are just estimates and should not be used as an absolute minimum expectation or maximum limitation for students. The structure of a Problem of the Month is a shallow floor and a high ceiling, so that all students can productively engage, struggle, and persevere.

To request the teacher notes that accompany the Problems of the Month, please get in touch with us via the feedback form.

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#### Counting & Cardinality

#### Geometry

#### Measurement & Data

#### Operations & Algebraic Thinking

#### Counting & Cardinality

#### Geometry

#### Measurement & Data

#### Operations & Algebraic Thinking

#### Geometry

#### Measurement & Data

#### Operations & Algebraic Thinking

#### Geometry

#### Measurement & Data

#### Operations & Algebraic Thinking

#### Expressions & Equations

#### Geometry

#### Measurement & Data

#### Numbers & Operations – Fractions

#### Numbers & Operations in Base Ten

#### Operations & Algebraic Thinking

#### Ratios & Proportional Relationships

#### Statistics & Probability

#### Expressions & Equations

#### Geometry

#### Measurement & Data

#### Numbers & Operations – Fractions

#### Numbers & Operations in Base Ten

#### Operations & Algebraic Thinking

#### Ratios & Proportional Relationships

#### Statistics & Probability

#### Algebra

#### Expressions & Equations

#### Functions

#### Geometry

#### Measurement & Data

#### Numbers & Operations – Fractions

#### Operations & Algebraic Thinking

#### Ratios & Proportional Relationships

#### Statistics & Probability

#### Algebra

#### Expressions & Equations

#### Functions

#### Geometry

#### Measurement & Data

#### Numbers & Operations – Fractions

#### Operations & Algebraic Thinking

#### Ratios & Proportional Relationships

#### Statistics & Probability

#### Algebra

#### Expression & Equations

#### Functions

#### Geometry

#### Measurement & Data

#### Ratios & Proportional Relationships

#### Statistics & Probability

#### The Number System

#### Algebra

#### Expression & Equations

#### Functions

#### Geometry

#### Measurement & Data

#### Ratios & Proportional Relationships

#### Statistics & Probability

#### The Number System

- digging dinosaurs
- once upon a time
- party time (See a video of a lesson based on this POM. )
- pick a pocket
- through the grapevine

- between the lines
- circular reasoning
- cubism
- cut it out
- cutting a cube
- fractured numbers
- infinite windows
- lyle's triangles
- part and whole
- piece it together
- polly gone
- surrounded and covered
- the shape of things
- what's your angle
- william's polygons

- fair games
- fair games (color version)
- first rate
- game show
- measuring mammals
- on balance
- rod trains
- sorting the mix

- between the lines
- circular reasoning
- cubism
- cut it out
- cutting a cube
- fractured numbers
- infinite windows
- lyle's triangles
- part and whole
- piece it together
- polly gone
- surrounded and covered
- the shape of things
- what's your angle
- william's polygons

- fair games
- fair games (color version)
- first rate
- game show
- measuring mammals
- on balance
- rod trains
- sorting the mix

- between the lines
- circular reasoning
- cubism
- cut it out
- cutting a cube
- fractured numbers
- infinite windows
- lyle's triangles
- part and whole
- piece it together
- polly gone
- surrounded and covered
- the shape of things
- what's your angle
- william's polygons

- courtney's collection
- fair games
- fair games (color version)
- first rate
- game show
- measuring mammals
- on balance
- pick a pocket
- rod trains
- sorting the mix
- through the grapevine

- calculating palindromes
- digging dinosaurs
- diminishing return
- double down
- friends you can count on
- got your number
- growing staircases
- measuring up
- miles of tiles
- movin 'n groovin
- once upon a time
- party time (See a video of a lesson based on this POM. )
- perfect pair
- slice and dice
- squirreling it away
- the wheel shop
- tri-triangles

- between the lines
- circular reasoning
- cubism
- cut it out
- cutting a cube
- fractured numbers
- infinite windows
- lyle's triangles
- part and whole
- piece it together
- polly gone
- surrounded and covered
- the shape of things
- what's your angle
- william's polygons

- courtney's collection
- fair games
- fair games (color version)
- first rate
- game show
- measuring mammals
- on balance
- pick a pocket
- rod trains
- sorting the mix
- through the grapevine

- between the lines
- circular reasoning
- cubism
- cut it out
- cutting a cube
- infinite windows
- lyle's triangles
- part and whole
- piece it together
- polly gone
- surrounded and covered
- the shape of things
- william's polygons

- calculating palindromes
- digging dinosaurs
- double down
- growing staircases
- measuring mammals
- measuring up
- once upon a time
- perfect pair
- slice and dice
- sorting the mix
- squirreling it away
- tri-triangles

- friends you can count on
- party time (See a video of a lesson based on this POM. )
- pick a pocket
- rod trains
- through the grapevine

- between the lines
- circular reasoning
- cubism
- cut it out
- cutting a cube
- infinite windows
- lyle's triangles
- part and whole
- piece it together
- polly gone
- surrounded and covered
- the shape of things
- william's polygons

- calculating palindromes
- digging dinosaurs
- double down
- growing staircases
- measuring mammals
- measuring up
- once upon a time
- perfect pair
- slice and dice
- sorting the mix
- squirreling it away
- tri-triangles

- friends you can count on
- party time (See a video of a lesson based on this POM. )
- pick a pocket
- rod trains
- through the grapevine

- calculating palindromes
- diminishing return
- measuring mammals
- measuring up
- miles of tiles
- tri-triangles
- what's your angle

- between the lines
- circular reasoning
- cubism
- cut it out
- cutting a cube
- infinite windows
- lyle's triangles
- part and whole
- piece it together
- polly gone
- surrounded and covered
- the shape of things
- william's polygons

- first rate (See a video of a lesson based on this POM. )
- movin 'n groovin

- calculating palindromes
- diminishing return
- measuring mammals
- measuring up
- miles of tiles
- tri-triangles
- what's your angle

- between the lines
- circular reasoning
- cubism
- cut it out
- cutting a cube
- infinite windows
- lyle's triangles
- part and whole
- piece it together
- polly gone
- surrounded and covered
- the shape of things
- william's polygons

- calculating palindromes
- digging dinosaurs
- diminishing return
- growing staircases
- measuring mammals
- measuring up
- once upon a time
- perfect pair
- slice and dice
- tri-triangles
- what's your angle

- between the lines
- circular reasoning
- cubism
- cut it out
- cutting a cube
- double down
- infinite windows
- lyle's triangles
- miles of tiles
- part and whole
- piece it together
- polly gone
- surrounded and covered
- the shape of things
- william's polygons

- fair games
- fair games (color version)
- friends you can count on
- game show
- got your number
- on balance
- party time
- pick a pocket
- rod trains
- sorting the mix
- squirreling it away
- through the grapevine

- diminishing return
- measuring mammals
- measuring up
- miles of tiles
- once upon a time
- on balance
- perfect pair
- sorting the mix
- the wheel shop

- calculating palindromes
- digging dinosaurs
- diminishing return
- growing staircases
- measuring mammals
- measuring up
- miles of tiles
- once upon a time
- perfect pair
- slice and dice
- tri-triangles
- what's your angle

- caclulating palindrome
- cut it out
- digging dinosaurs
- double down
- first rate
- fractured numbers
- growing staircases
- movin 'n groovin
- slice and dice
- tri-triangles

- between the lines
- circular reasoning
- cubism
- cut it out
- cutting a cube
- double down
- infinite windows
- lyle's triangles
- miles of tiles
- part and whole
- piece it together
- polly gone
- surrounded and covered
- the shape of things (See a video of a lesson based on this POM. )
- what's your angle
- william's polygons

- cubism
- diminising return
- fair games
- fair games (color version)
- friends you can count on
- game show
- got your number
- on balance
- party time
- pick a pocket
- rod trains
- sorting the mix
- squirreling it away
- through the grapevine