Mathematics: Geometry and Spatial Sense:
• Construct polygons using a variety of tools, given angle and side measurements
• Explain how a coordinate system represents location, and plot points in the first quadrant of a Cartesian coordinate plane
Knowledge of the basic Scratch Tips activities and familiarity with taking screencaptures and using a word processor program
These lessons provide opportunities for teachers and students to gather evidence through teacher, peer, and self-assessments; and learning goals and success criteria. See Growing Success: Assessment, Evaluation, and Reporting in Ontario Schools, Chapter 4 for more information.
 Review with students how to construct angles and polygons On chart paper, make a list of the the polygons we know how to make (e.g.rectangle, square, triangles and parallelogram) Remind students they will be using that knowledge today

Scratch Screenshot

 Discuss with students that they will use Scratch to draw: rectangle, right angle triangle, acute triangle, a square and a parallelogram (highlight these on the chart paper) Provide the two following requirements: Each polygon must have one side that is 70 units long One of the polygons needs to be placed in the first quadrant Inform students that they should add a description to each of their scripts of code to explain how they know they have completed the task Students work at computers or mobile devices with Scratch Remind students to either save their files or take screenshots of their work and paste them into a word processor

Scratch Screenshot

Scratch Screenshot

 The students will come back together and share how they made each shape Students share their script on chart paper and/or project on a large screen
• Students could work in partners or small groups.
• The students could construct one polygon at a time and then annotate their ideas
• Perform the same lesson/activity and have partners present each otherâ€™s creations of the polygons.
• Continuing to use Scratch to reflect, translate or rotate shapes.
• Develop a game to share the students knowledge of geometry https://scratch.mit.edu/projects/1952443/ .