Grade 3 Math Unit9.1 Quadrilaterals for Kids | Four Straight Sides, Four Corners, Closed

A shape is not in this family because of how it looks. It is in the family because of what you can count on it - and Buddy the Bear counts every one of them out loud, with a gold pen that really walks around the outside. WHAT IS IN THIS LESSON (Unit 9.1, quadrilaterals) Part 1 the three rules: four straight sides, four corners, closed Part 2 is it a quadrilateral? Three ways to ask, with the shape still on screen while you think Part 3 right angles - the corner of a piece of paper laid on each corner Part 4 sides that match, sides that never meet: equal marks and parallel pairs Part 5 sorting boards: two bins, then the families by side count Part 6 the FAQ - does turning, leaning or having two names change the answer? HOW THE QUESTIONS WORK Seven questions, each keeping its picture on screen. The video reads the sides, then leaves 2.8 seconds of complete silence with three bouncing dots so your child can answer out loud before the reveal. One asks whether a shape is a quadrilateral, two ask for its name, two ask which of three shapes to point at, one counts right angles and one counts pairs of parallel sides - and each reveal is worked out again on the picture rather than announced. WHAT YOUR CHILD WILL LEARN the three rules a quadrilateral has to follow: four straight sides, four corners, and the line gets back to where it started why a triangle, a pentagon, an open shape and a curved shape are all out what a right angle is, tested with the corner of a piece of paper how hash marks show sides the same length, and how a kite differs from a parallelogram that turning or leaning a shape does not change which family it is in that one shape can have two true names at once COVERS THE LESSON PAGE (Unit9.1 "Quadrilaterals") Learn: Intro to quadrilaterals | Identifying quadrilaterals | Right angles in shapes (informal definition) | Quadrilaterals: FAQ | Analyze quadrilaterals | Classify quadrilaterals Practice: Identify quadrilaterals (5 of 7) | Analyze quadrilaterals (3 of 4) | Classify quadrilaterals (3 of 4) Grade 3 (ages 8 to 9). US English narration and on-screen text. Aligned to CCSS 3.G.A.1 - understand that shapes in different categories (e.g. rhombuses, rectangles, squares) may share attributes, and see how those attributes define a subgroup (e.g. rhombuses, rectangles and squares belong in the subgroup quadrilaterals). CHAPTERS 0:00 Hello from Buddy: the three rules 0:40 Four sides, four corners, closed 2:28 Is it a quadrilateral? 3:48 Right angles: the paper corner test 5:19 Sides that match, sides that never meet 7:16 Practice: name it and analyse it 8:41 Practice: sort the shapes into families 9:12 FAQ: turning, leaning, and two names 10:31 What we learned today