




Properties of 2dimensional shapes.
Develop understanding of rectangular arrays and of area.
Geometric measurement: understand concepts of area and relate area to multiplication and to addition.
Geometric measurement: recognize perimeter as an attribute of plane figures and distinguish between linear and area measures.
Reason with shapes and their attributes.
Collaboration & Communication

Creativity & Innovation

Critical Thinking & Problem Solving

Research & Information Fluency

Social & Emotional Intelligence

3.MD.5   Recognize area as an attribute of plane figures and understand concepts of area measurement. 
3.MD.6   Measure areas by counting unit squares (square cm, square m, square in, square ft, and improvised units). 
3.MD.7   Relate area to the operations of multiplication and addition. 
3.MD.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. 
3.G.1   Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories. 
3.G.2   Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape. 




Vocabulary – Specialized and High Frequency
sides, angles, plane figure, unit square, square unit, polygons, perimeter, area, attribute, rhombus, rectangle, quadrilateral, polygons, regular, irregular
Misconception Alerts:
A square is a special rectangle. (true)
Diamond is not a mathematical term. (true)
Students need experience with irregular polygons.
Common Core State Standards: Standards for Mathematical Practice
Standard 1: Make sense of problems and persevere in solving them
Standard 2: Reason abstractly and quantitatively
Standard 3: Construct viable arguments and critique the reasoning of others
Standard 4: Model with Mathematics
Standard 5: Use appropriate tools strategically
Standard 6: Attend to precision
Standard 7: Look for and make use of structure
Standard 8: Look for and express regularity in repeated reasoning