This lesson helps to illustrate the need to clearly specify the unit of a fraction in order for it to be interpreted or used with any meaning.
What to look for
Some of the wording in the problems might need to be adjusted slightly depending on the background of the students. The language of tiling is one possible instance—a region is tiled by a shape if it is completely covered by the shape with no gaps or overlaps.
Identify three fractions equivalent to (4/12).
Answer: (1/3), (2/6), (3/9), …