The Measurement Unit involves strong connections between attributes that can be measured (distance, time, capacity, mass, and area), formula building (algebraic reasoning), and the four operations. Questions to answer may include:

• How does knowing the relative sizes of measurement units help to estimate measurements? How does estimation help to determine the reasonableness of a measure?

• How are the four operations useful in quantifying attributes that can be measured?

• What is a formula? What variables are involved in finding area? How does the formula for finding area differ from the formula for finding perimeter? How can you explain this?

Math Concepts and Skills: 

The student selects appropriate customary and metric units, strategies, and tools to solve problems involving measurement.

The student:

• uses the relative sizes of measurement units to convert measurements within the same measurement system, customary or metric.

• solves problems involving measurements of length, intervals of time, liquid volumes, and mass using all four operations as appropriate.

• develops the formulas for the perimeter of a rectangle (l + w + l + w or 2l + 2w) including the special form for the perimeter of a square (4s) and the area of a rectangle (l x w).

• solves problems related to perimeter and area of rectangles with whole number dimensions.