Grade Level:	3-5	Lesson Title:	Introduction to LOGO Programming 3 (Arcs and Circles)
Objective:	Students use REPEAT command and proper LOGO syntax to create geometric figures and designs. ü Identify and describe the characteristics of digital input, processing, and output ü Use interactive technology environments to manipulate information ü Use appropriate software to express ideas and solve problems ü Identify attributes of any shape or solid ü Describe shapes and solids in terms of vertices, edges, and faces ü Use tools such as real objects, manipulatives, and technology to solve problems
Procedure:	1. Students open MSW LOGO. (Start>Programs>Microsoft Windows LOGO>MSW LOGO) 2. Review REPEAT command from last week. 3. Review the proper syntax for a repeat command: REPEAT 4 [FD 100 RT 90] to make a square, for example. Help students find straight bracket keys on keyboard. 4. Introduce the CIRCLE command: CIRCLE 50 makes a circle with radius 50. 5. Introduce the ARC command: ARC 180 50 makes an arc of 180 degrees with radius 50. 6. Have the students use the REPEAT command to draw squares, stars, hexagons or pentagons on the screen. 7. Extension: Have students experiment with repeat, drawing shapes over and over. Demonstrate the patterns that repeating a shape can make. Show students how to change screen and pen colors for more effects.
Materials:	MSW LOGO (Installed on all computers) Turtle spinner REPEAT command (on bulletin board) LOGO commands (on bulletin board)
Notes:	http://www.ambleside.schoolzone.co.uk/ambleweb/logo/basics.htm http://members.aol.com/mckoss/basiclogo.htm To repeat: REPEAT # [COMMAND1 # COMMAND2 #] Hexagon: REPEAT 6 [FD 100 RT 60] Pentagon: REPEAT 5 [FD 100 RT 72] Star: REPEAT 5 [FD 100 RT 144]