Khan Academy: Counting Unit Squares to Find Area Formula

What is the area? Because there is only one problem here with a detailed explanation below, consider projecting this as an all-class warm up. Learners examine a rectangle split into 12 squares. They know that each unit is three...

Get third graders excited to work find area and perimeter of unit squares, rectangles, and irregular shapes. A 36-page packet comes with task cards, graphic organizers, practice worksheets, printables with squares, exit tickets, and word...

Sal uses unit squares to see why multiplying side-lengths can also find the area of rectangles.

Conceptualize what area is by calculating the area of a rectangle by using unit squares and the area formula. [3:21]

Find the area of shapes by counting the unit squares inside them. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video tutorial, or receive hints on how to find area....

Practice finding the area of rectangles by counting unit square. Create rectangles with a given area by covering unit squares. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...

Even though there is a wide variety of different triangles in the world, knowing a single equation allows us to find the area of each and every one of them. Follow along with this step-by-step presentation as Zoe clearly models how to...

Lindsay finds the area of a rectangle both by counting unit squares and multiplying side lengths.

Practice decomposing figures into rectangles to find area. Some figures are on grids. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints. CCSS.Math.Content.3.MD.C.7.d...

In this exercise, students practice decomposing figures to find area. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.