3RD GRADE MEASUREMENT AND DATA

Solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects

3.MD.A.1 Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.

Word Problems: Time Intervals

Represent and interpret data

3.MD.B.3 Draw a scaled picture graph and a scaled bar graph to represent a data set with several categories. Solve one-and two step “how many more” and “how many less” problems using information presented in scaled bar graphs. For example, draw a bar graph in which each  square in the bar graph might represent 5 pets.

Represent and Interpret Data  

3.MD.B.4 Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch. Show data by making a line plot, where the horizontal scale is marked off in appropriate units- whole numbers, halves, or quarters.

Measure to the Nearest Half-Inch 
Literature Link: Jim and the Beanstalk
Literature Link: Inchworm and a Half

Geometric measurement: understand concepts of area and relate area to multiplication and to addition

3.MD.C.5 Recognize area as an attribute of plane figures and understand concepts of area measurement.
a. A square with side length 1 unit, called a “unit square”, is said to have “one square unit” of area, and can be used to measure area.

Square Units

b. A plane figure which can be covered without gaps or overlaps by n unit squares is said to have an area of n square units.
Sample Activities:
Area on the Geoboard
Find the Area   (N.B. When printing this activity you may need to specify no page scaling so that the exact size is maintained. Some printers by default print pages at the setting 'Shrink to Fit'. Ensure that your printer is set to print at 100%.)

3.MD.C.6 Measure areas by counting unit squares (square cm, square m, square in, square ft, and improvised units).

Grid Paper Animals
Cover Your Notebook

3.MD.C.7 Relate area to the operations of multiplication and addition.
a. Find the area of a rectangle with whole-number side lengths by tiling it, and show that the area is the same as would be found by multiplying the side lengths.

Find the Area of a Rectangle

b. Multiply side lengths to find areas of rectangles with whole-number side lengths in the context of solving real world and mathematical problems, and represent whole-number products as rectangular areas in mathematical reasoning.

c. Use tiling to show in a concrete case that the area of a rectangle with whole-number side lengths a and b + c is the sum of axb and axc. Use area models to represent the distributive property in mathematical reasoning.

Jack's Rectangles 

d. Recognize area as additive. Find areas of rectilinear figures by decomposing them into non-overlapping rectangles and adding the areas of the non-overlapping parts, applying this technique to solve real world problems.

Find Areas of Rectilinear Figures (v. 1)
Design a Flower Bed

Geometric measurement: recognize perimeter as an attribute of plane figures and distinguish between linear and area measures

3.MD.D.8 Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.

Squares on a Geoboard
Rectangular Robot