Khan Academy
Khan Academy: Equal Parts of Circles and Rectangles
Sal determines if shapes are divided into 2 or 4 equal sections. Includes a video, transcript, and question and answer section. [3:04]
CK-12 Foundation
Ck 12: Elem Math: Overview of Ellipses Trapezoids Rhombi and Polygons
[Free Registration/Login may be required to access all resource tools.] The video draws and defines an ellipse, trapezoid, rhombus, and polygon.
CK-12 Foundation
Ck 12: Elem Math: Overview of Lines, Curves, Vertices, and Sides of 2 D Shapes
[Free Registration/Login may be required to access all resource tools.] The video gives examples and defines lines, curves, vertices, and sides of 2D shapes.
CK-12 Foundation
Ck 12: Elem Math: Overview of Rectangles Squares Circles and Triangles
[Free Registration/Login may be required to access all resource tools.] The video gives a quick overview of 4 basic shapes: square, rectangle, circle, and triangle. Real world examples of each are also provided and briefly discussed
Khan Academy
Khan Academy: Recognizing Shapes
Discusses how to identify basic 2D shapes by their properties. [6:08]
CK-12 Foundation
Ck 12: Elem Math: Overview of Rectangles Squares Circles and Triangles
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on various two dimensional shapes including rectangles, squares, circles and triangles.
Loyola University Chicago
Math Flix: Concept Development Rectangles
This QuickTime movie provides an opportunity to learn about the characteristics of a rectangle. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Khan Academy
Khan Academy: Equal Parts of Circles and Rectangles
Sal determines if shapes are divided into 2 or 4 equal sections.
Other
Corbettmaths: Videos and Worksheets for Math
Click on Videos to find Videos and Workshops for math videos, practice questions, and textbook exercises for math. It includes shapes, addition, algebra, Algebraic fractions, Angles, Area, Averages, and much more. Answers are provided.
Math Mammoth
Math Mammoth: Easy Fractions for 2nd Grade Math
Teaches halves, thirds, and fourths, and how to partition rectangles into equal fractional parts. [6:52]
Khan Academy
Khan Academy: Decomposing Shapes to Find Area: Subtract
Demonstrates how to find the area of a rectangular shape enclosed by another rectangle and with a third one inside it. [3:12]
Khan Academy
Khan Academy: Decomposing Shapes to Find Area: Add
Demonstrates how to break an irregular shape into three rectangles, find the individual areas, and then add them together. [3:36]
Khan Academy
Khan Academy: Comparing Areas and Perimeters of Rectangles
Sal compares the areas and perimeters of rectangles to a given rectangle.
Imagine Learning Classroom
Learn Zillion: Video: Find the Number of Same Size Squares in a Rectangle
In this lesson, you will learn how to find the total number of same-size squares in a rectangle by dividing it into rows and columns. [3:06]
Other
Corbettmaths: Names of Quadrilaterals Video 2
Video tutorial discusses 6 types of quadrilaterals: square, rectangle, rhombus, parallelogram, trapezium, and kite. [3:21]
Khan Academy
Khan Academy: Decomposing Shapes to Find Area: Grids
Demonstrates how to break an irregular shape into its parts, find the individual areas, and then add them together. [2:51]