Reflection: Lesson Planning Identifying 2D Shapes - Section 1: Teaching the Lesson


I created the PowerPoint to show examples of the many terms of this lesson in a way that might be more exciting for students. I do not want to always present things in the same manner. The PowerPoint presentation gave me a way to assess student understanding.

With the term parallel, it was clear that students did not really understand the meaning. I told them a story about a train going along the tracks. "One day a man was fixing the tracks and he moved one side closer to the other (no longer parallel - but I didn't say that, just drew it). The train came along and boom, it fell off the tracks. The conductor asked the man what he had done? "I just moved the track because there was a tree in the way." "You can't do that, " said the conductor, "because then my train can't go any further. The wheels are always the same distance apart." I continue the story, by describing how the operator fixed the track, and the train went on its way. I say that the train went on until it got to a place where some men were building a new building, they moved just one track because it was in their way. Again the train went boom, and fell off the track. I repeat the conductor's questions and concerns again. Again the track is fixed.

I ask students if they notice anything about the two tracks? They realize that the 2 lines are always the same distance apart. I tell them this is what parallel is. 

Sometimes a little story can help to clarify an understanding. I draw pictures as I tell the story, and later on I can refer to the context of train tracks if I need to help students recall prior knowledge about parallel lines. 

  Using Examples
  Lesson Planning: Using Examples
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Identifying 2D Shapes

Unit 15: Geometry
Lesson 2 of 7

Objective: SWBAT identify triangles, quadrilaterals, pentagons, hexagons, octagons, angles, and parallel sides.

Big Idea: The Common Core standard is that students will be able to recognize shapes based on attributes such as the number of angles, faces and vertexes.

  Print Lesson
Math, Geometry, reasoning, identify 2, shapes, attributes
  50 minutes
screen shot 2014 01 14 at 8 27 30 pm
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