1. Section 1 Introduction National 4/5 Scratch Course

2. What you should know after this lesson What is a program Who writes programs Why is sequence important in programs

3. Programming A program is a list of instructions that tell the computer what to do. A programmer writes the programs A user uses the programs Scripts are small programs You will be both programmer and user in this topic.

4. What is Scratch Scratch is a programming language and environment that was developed by MIT to help new programmers learn to program quickly. It has been designed to be used by programmers from nursery to adult.

5. Getting Started Moving the cat Launch Scratch We want to move the cat forward 100 steps so we drag the move block to the script area. Change the 10 to 100 What happens when you double click it?

6. Turning the Cat We want the cat to turn to the right. Drag the turn clockwise block to the script are and attach it to the bottom of the previous block. Change the 15 to 90 and double click it This is how we join the program blocks together, you can unsnap a single or bunch of blocks by dragging them.

7. Drawing If we keep double clicking on the blocks you should notice the cat moves in a circular fashion. Drag the “pen down” block from the pen tab, to the top of the program What happens when you keep double clicking it?

8. Drawing a square I don’t want to double click the block every time to draw a side of the square, I would rather double click it once and have it draw the square for me. How can I change the program to make this happen? Hint on next page

9. Drawing a Square

10. Tasks Create a program to draw a square. Copy the diagram from the previous slide into your jotter. Write the program to draw a square into your jotter.

11. Adding a new Sprite Sometimes it is nice to have more than one sprite on the screen. Get a new surprise sprite Write a program to draw a triangle using the new sprite. Hint: the angle is 120

12. All at once Wouldn’t be easier if there was a start button? Well there is go to the control tab and drag “when flag clicked” to the top of each of your sprite’s program. Now when you click on the flag (top right) your program will run

13. Review Question Write the question & answers in your jotter 1.What is a program? 2.Who writes programs? 3.Why is sequence important in programs?

14. Extension Tasks Modify your program to draw the following shapes 1.A hexagon 2.A pentagon 3.A circle 4.A star