Measuring Length

For the past few weeks, we have been working on measuring length.  We began this unit by identifying the longest edge of classroom objects, such as cards, pencils, scissors, and glue bottles.  Then we started measuring the objects with connecting cubes.  My initial goal for the kiddos was to understand that we have to measure from one end of an object all the way to the other end.  They also needed to understand that units of measurement need to be the same, and they need to lay next to each other with no gaps.  

In order to break down the steps, I created an Anchor Chart for the steps to measure accurately.  Then we practiced measuring objects with different units, including inch tiles and clips.  Quickly, the students began to notice that an object could be a different "length" when it is measured with a different unit.  For some kiddos this is a complicated concept.  However, after practicing with a variety of different measurement units most of the kiddos began to get the hang of it.  

Finally, I introduced the idea that not all objects are whole numbers.  The kiddos learned how to notice and record 1/2.  This is another difficult idea for the kiddos to comprehend, because they tend to count the total number of units and then add the half.  We reviewed how to choose a measurement unit and how to count until the last full unit before adding half.  This unit is very hands-on which helps the kiddos make a lot of connections and develop their understanding quickly.