Scratchfor that programming itch

Jarrod BellPrincipal of Technology

This lesson was first used with the #sd60 Middle School Gifted class. It ran around 3 hours with an hour of discovery time included.

Good Morning

Explain to the person to your left, how you would make a peanut butter and jam sandwich.

Mr. Bell, what does this have to do with computer programming!?

PBJ

Open up TextEdit/Word etcWrite a series of instructions for your robot to create a peanut butter and jam sandwich.You have the following variables● A Loaf of Sliced Bread in a Bag● 1L Jar of Peanut Butter● 500mL Jar of Strawberry Jam● A Knife● A Plate

PBJ

What assumptions have you made about your robot? ● Can it identify the items● Does it know how to pick up the knife,

open the jars, bag etc● Did you have it open the bag, jars, explain

where to put the knife in etc.● Discuss your instructions and where your

robot wouldn't know what to do● Computer programs are only as good as

our instructions

PBJ

● Free Software Developed by MIT● Follows in the footsteps of Squeak,

SmallTalk-80● LOGO programming language by

Seymour Papert - developed on the work of Jean Piaget

● http://scratch.mit.edu ● Unlike our robot, Scratch has been taught

how to do many things already (libraries, pre built instructions)

Scratch

x-y0,0 is the centreAngles are in Degrees 0 Degrees is up-180 Degrees is down-90 Degrees is left90 Degrees is right

Coordinate Plane & Angles

Show and tell on the major parts of the Scratch program, stage, scripts, costumes, editor, programming blocks etc.

Look around

● Example with the cat walking and changing costumes

● Wall and how to bounce

Change Costumes and Motion

Make some noise!Music and Sound examples in section 5, and 2 at http://elem.prn.bc.ca/course/view.php?id=9

Sound

Run up the score! ● add in another sprite● increment a variable if the cat touches the

new sprite● Say something when the score reaches a

value

Variable

● One Character Moving ● Two Characters Moving and increment

score if they touch● Keyboard Control for One Character,

Avoid the other moving character (Asteroids example from Scratch website http://scratch.mit.edu/projects/SonicPopsDad/245563)

● Music● Maze Game

Discover

Photo Attribution: http://www.fotopedia.com/items/flickr-66495468

Challenge - One Player Pong

Three Sprites (paddle, ball, goal)Play against WallAngle of Incidence and ReflectionSpeedCounter

How could you create One player vs Computer so that the computer could miss?

http://scratch.mit.eduhttp://wiki.scratch.mit.edu/wiki/Main_Page

Resources