Altogether, this is a thorough coverage of the topic, with the exception of temperature which has some strong points and one notable weakness. As noted above, perimeter is covered in the measurement chapter, with perimeter introduced before area. The first lesson begins with the teacher reading the definition of perimeter from the top of the work sheet. This leaves no doubt as to the meaning of perimeter. Both the work sheet and the teacher stress that one measures all sides and adds their measures to get perimeter.
Exercises practice on classroom objects and on shapes on worksheets.
None of the problems strain the previously mastered addition skills of the students. There are no exercises with curved shapes or drill with more difficult numbers or complicated shapes not generated with unit area blocks. In summary, the key points are covered with some drill, but some extensions of the idea are not covered. The level of depth is sufficient that a student who masters the material will be well prepared to move on at the next level and in appropriate real world situations. Others, such as multiplication, are disappointingly poor in presentation and level.