• Chapter 8:
    Playground Design 
  • Overview 

    In this final unit of the year, students design and build scaled model playgrounds that incorporate simple machines. They investigate simple machines in playground equipment and conduct research to help them make decisions about safety issues. They then survey the school community to find the most important playground items to use in their designs and use graphs to visualize the data they collect. Students use the information to create a scaled map of their designs, from which they build a scaled 3-D model. They also discuss the needs of plants and plant a model grass field in preparation for finding the scaled measurements and cost for planting a much larger field. They work with mass, liquid volume, area and perimeter during this portion of the unit. An optional Playground Model Showcase gives students an opportunity to prepare their work for sharing with friends and family members or students from other classrooms.

     Skills Across the Grade Levels 

    The table below shows the major skills and concepts addressed in Unit 8. It is meant to provide a quick snapshot of the expectations for students’ learning during this unit, as well as information about how these skills are addressed in Bridges Grade 3, elsewhere in Grade 4 including Number Corner (NC), and also in Grade 5. 

    Major Skills/Concepts Addressed Gr. 3 Unit 8 Gr. 4 Elsewhere Gr. 5

     4.G.1 Identify points, lines, line segments, rays, and angles (right, acute, obtuse), parallel lines, and perpendicular in 2-D figures.

     4.G.1 Draw right, acute, obtuse angles, parallel lines, and perpendicular lines.

     4.MD.1 Express a measurement in a larger unit in terms of a smaller unit within the same system of measurement.

     4.MD.1 Identify the relative sizes of units within a system of measurement.

     4.MD.1 Record equivalent measurements in different units from the same system of measurement using a 2-column table.

     4.MD.2 Solve story problems involving distance, liquid volume, intervals of time, mass, and money using addition, subtraction, multiplication, or division of whole numbers, fractions, or fractions. 

    4.MD.2 Solve story problems that involve expressing measurements given in a larger unit in terms of a smaller unit within the same system of measurement; use diagrams to represent measurement quantities.

     4.MD.3 Apply the perimeter and area formulas for a rectangle to solve a problem. 

    4.MD.5 Identify an angle as a geometric figure formed where two rays share a common endpoint. 

    4.MD.6 Use a protractor to measure angles in whole degrees; sketch an angle of a specified measure. 

    Supports 4.MD Describe what mean, mode or range indicate about data. 

    Supports 4.MD Determine the mean, mode, or range of a set of data comprising whole numbers, fractional numbers, or decimals. 

    Supports 4.MD Display and analyze data using spreadsheet software.

    *Retrieved on July 21, 2021 from http://bridges.mathlearningcenter.org/