This lesson explains why measurement is important, standard units of measurement (such as inches, pounds, and pints) and non-standard units of measurement (steps, hand spans, cubes, and counters). *(Most appropriate for grade levels K-2.)*

__Lesson Time__: 40-45 minutes

__Student Activity 1__: This activity has students measuring the length of a pencil with paperclips. Student pairs will have different sized paperclips, so that the discussion can be had about the importance of a standardized way of measuring.

__Student Activity 2__: This activity has student pairs measuring different objects, all by lining up pre-cut 1-inch squares

__Group work__: Students will work in pairs of 2 students. In order to save time, teachers are asked to create the groups before our Wizard arrives.

__Math Standards__:

*K.MD.2**: Directly compare two objects with a measurable attribute in common to see which object has “more of” or “less of” the attribute and describe the difference.*

*1.MD.1**: Order three objects by length; compare the lengths of two objects indirectly by using a third object.*

*1.MD.2**: Express the length of an object as a whole number of length units by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps.*

*2.MD.2**: Measure the length of an object twice, using length units of different lengths for the two measurements; describe how the two measurements relate to the size of the unit chosen.*

*2.MD.4**: Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard-length unit.*

*2.MD.9**: Generate measurement data by measuring lengths of several objects to the nearest whole unit or by making repeated measurements of the same object.*