6 lesson program for teaching grades 2-4 to program in Scratch

1. Scratch
Lesson 5
1

2. Starter
1. Open the Cat Run game
2. Complete the script so that:
• when the cat touches the green
colour it moves back 5 steps
• when the right arrow key is pressed it
turns 15 degrees to the right
• when the left arrow key is pressed it
turns 15 degrees to the left
2

3. Objective of the lesson
Move a sprite using the keyboard
• All of you will:
– Make a sprite turn and move using the keyboard
• Most of you will:
– Understand the X and Y positions and use them to
control a sprite to write your name
• Some of you will:
– Make a game using two methods to move the sprites
3

4. X and Y
X is about the left and right position
Y is about the up and down position
4
X = -240 X = 240
Y = 180
Y = -180

5. X and Y
Where would X = 0 and Y = 0 be on the box
below?
5
X = -240 X = 240
Y = 180
Y = -180
Here, in
the centre

6. X and Y
Where would X = 240 and Y = 0 be on the
box below?
6
X = -240 X = 240
Y = 180
Y = -180
Here

7. X and Y
Where would X = -100 and Y = 180 be on
the box below?
7
X = -240 X = 240
Y = 180
Y = -180
Here

8. X and Y
Where would X = 120 and Y = -100 be on
the box below?
8
X = -240 X = 240
Y = 180
Y = -180
Here

9. Pen game
• Open the Pen game.
• Complete the scripts so that
when the other arrow keys
are pressed they move the
sprite in the correct
direction.
• Test it out by clicking on the
green flag and
try to write
your name.
9

10. Bat game
• Create a new game;
change the background
and delete the cat
sprite.
• Add the Bat sprite and
import a second
costume showing the
bat with its wings in a
different position.
10

11. Add the script
• When the green flag is
clicked, make the bat
change costume every
0.25 seconds.
• When the arrow keys
are pressed then
make the bat move in
that direction.
11

12. What will this script do?
• Add a sprite of your
choice and the script as
shown.
• Alter the script so that
your new sprite will
point towards the bat
before it starts moving.
12

13. Over to you…
• Try to think of different ways
you could make your game
more exciting.
• Try out each others’ games
and decide what makes a
good game.
• Why are some games better
than others?
13

14. What skills have you practiced today?
New skills you have learnt today…
14
Revisit skills from another lesson…