Computer Science Lesson Plan
Class: 6 - Lesson: 15 Advanced Programming (Pen)

Purpose: To learn to use the pen tool in Scratch together with motion, looks, events and control blocks.

No. of Classes

One or two classes (teacher's decision).

Material Required

Scratch 3.0.

Curriculum Content
  • 5.8) Pen
    •

    Prior Knowledge

    Students should know:

  • How to draw basic shapes, and have some idea of the length of the sides and the angles in basic shapes.

    • Exercise

    Exercise 1


    Exercise 2


    Exercise 3


    Solutions


  • Link to copy the solution program for Exercise 1 (draw circle).
  • Link to view the solution video for Exercise 1 (draw circle).
  • Link to copy the solution program for Exercise 1 (draw rectangle).
  • Link to view the solution video for Exercise 1 (draw rectangle).
  • Link to copy the solution program for Exercise 1 (draw square).
  • Link to view the solution video for Exercise 1 (draw square).
  • Link to copy the solution program for Exercise 1 (draw triangle).
  • Link to view the solution video for Exercise 1 (draw triangle).
  • Link to copy the solution program for Exercise 2.
  • Link to view the solution video for Exercise 2.
  • Link to copy the solution program for Exercise 3.
  • Link to view the solution video for Exercise 3.

    • Teacher Instructions
    1. Teachers should revise simple mathematics - the sides and angles of shapes - before setting this exercise.
    2. Use the exercise to reinforce students' understanding of basic shapes and the relationship between the lengths of the sides in different shapes. Challenge students to draw a rhombus or a parallelogram, and to draw a triangle other than an equilateral triangle. If students know Pythagoras' theorem, have them draw a right-angled triangle and work out what the hypotenuse needs to be. This will help them understand the shapes better.
    3. POINTS TO PONDER: Notice that to draw a regular polygon with N sides, the sprite needs to turn 360/N degrees at each corner. Why? The sum of the interior angles of an N-sided polygon is always (N - 2) × 180 degrees - 180 for a triangle, 360 for a quadrilateral, and so on. You can help students work out why.