Reflection: Lesson Planning Lines and Line Segments - Section 2: Teaching the Lesson


I planned this lesson based upon what I understood that students had covered in first grade for measurement. The term I thought they had been introduced to was segment, but no one was able to come up with the word, and even when we had the word, no one knew what a segment was. I had to adapt the lesson to explain what a segment was.

The thing I didn't think they had covered in first grade was the naming of end points of line segments. When I pointed out the lines with points and labels at the end, the students knew right away that lines were named by their end points. 

I did not need to teach this portion of the lesson. 

It is important when I am teaching that I watch how students react to what I am teaching. I constantly ask myself, "Does anyone know what I am talking about?" "Does everyone already know this?" "Do some students grasp what I am teaching, while others have no idea?" Each of those questions causes me to think about how I might need to adapt the lesson, even during the lesson, in order to best meet the needs of my students.

  Prior Knowledge
  Lesson Planning: Prior Knowledge
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Lines and Line Segments

Unit 15: Geometry
Lesson 1 of 7

Objective: SWBAT identify and measure a line segment using the appropriate tool, recording their outcome using the correct units.

Big Idea: Common Core expectations for second grade are that students will be able to measure a line segment, record the length in appropriate units, and add and subtract to compare the lengths of the lines.

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