Unit+6+Task+1



**Task One Objectives :[[image:proton_bot_wind_up_toy_lg_clr.gif align="right"]] **
 **  
 * Today you will learn: **
 * that a set of traffic lights is an example of a computer controlled system.
 * how to prepare succinct instructions to carry out a particular task.
 *  at least one advantage of using a computer to control a set of traffic lights.
 * I am looking for you to:
 * identify the sequence in traffic lights
 * talk about the instructions needed to make traffic lights work. E.g start, wait, stop, turn on/off etc
 *  write a set of instructions which might work traffic lights
 *  explain why instructions have to be clear and exact

**Task One instructions :**
1 Check how much you know already about control - View [|7.6_1_checking_previous_experience.ppt]. 2 Watch and discuss the Slideshow 1 ([|7.6.1.slideshow1.ppt] ). 3 Look at [|7.6 mimic_index.ppt]. In groups, discuss the different pictures. Each group reports back to the class. 4 Make a new folder: My Documents\ICT\**Control**. 5 Save and Open [|7.6 Pupil_resource_1.1.ppt]. Complete the task. 6 Discuss the lesson with your teacher. 7 **Homework:** Describe three differences between a human school crossing control and a pelican crossing. Give one advantage and one disadvantage for each of the two types of crossing. **Teacher Notes 1** - [|7.6 Help1.doc]
 * What could be controlled automatically?
 * How does it do this? What is switched on and off? What sensors are used?
 * Teacher Notes 2** - [|7.6 Help2.doc]