# Category - Number Sense

## Visualizing The Volume of a Cylinder

Visual number talk prompts to build on the conceptual understanding of area of a circle to emerge the formula for volume of a cylinder.

## Revealing Equivalent Ratios By Scaling In Tandem

Visual number talk prompts emerging the idea of revealing equivalent ratios by scaling in tandem with ratio reasoning.

## Where Does The Area of a Circle Formula Come From?

Visual number talk prompts unpacking where the area of a circle formula comes from by decomposing the circle and recomposing into a rectangle

## How to Find the Circumference of a Circle Using Pi, π

Visual number talk prompts exploring the ratio between the circumference and the diameter known as Pi, π with ratio & rate reasoning.

## Partitive Division of Whole Numbers Revealing a Fractional Quotient

Visual number talk prompts that explore partitive division of whole numbers resulting in a fractional quotient (or fractional answer).

## Area of Composite Figures With Non-Standard Units

Visual number talk prompts that explore the area of a composite figure by decomposing and recomposing with non-standard units.

## Multiplicative Comparison With Volume

Visual number talk prompts comparing the volume of 3-D figures multiplicatively using various standard and non-standard cubic units.

## Representing Fractions By Partitioning a Number Line

Visual math talk prompts used to help students better conceptualize fractions by partitioning a number line into different fractional amounts.

## Two-Step Equations With Partitive and Quotative Division

Visual math talk prompts used to help emerge the writing and solving of two-step algebraic equations involving both types of division.

## Solving Two-Step Equations With Context [Part 2]

Visual math talk prompts with context used to help emerge the writing and solving of two-step algebraic equations involving partitive division.