Third graders learn that any closed shape with exactly four straight sides is a quadrilateral, and sort familiar shapes into quadrilaterals and shapes that are not.
Students will be able to…
Squares, kites, and trapezoids look quite different, yet they belong to the same family. What single rule decides whether a shape is a quadrilateral?
Project this and sort each shape into quadrilateral or not — tap a shape, then tap whether it has exactly four straight sides.
Tap any phase to open the teacher moves and student actions.
What do a square, a kite, and a trapezoid all have in common?
Students sort shapes into quadrilaterals or not.
Students test shapes against the rule.
Students draw different quadrilaterals.
Students reflect on the rule.
Aligned to the Common Core State Standards for Mathematics (Grade 3).
Understand that shapes in different categories may share attributes, and recognize examples of quadrilaterals.
Recognize and draw shapes having specified attributes, such as a given number of sides.
Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines.
Look for and make use of structure.
Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.
Have students draw a square, rectangle, trapezoid, and rhombus, and label the four sides on each to show they are all quadrilaterals. A printable quadrilaterals worksheet is in the Mathematics library.
Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.
A quick self-check with instant feedback, drawn from this lesson’s key terms.
A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.