SSAT Computing Conference 2014 Workshop - Scratch Binary Converter

Andy ColleyICT AST, BSC, SSC, NCQW

@MrAColleywww.mrcolley.com

@MrAColley www.mrcolley.com

Why do we use computers?

Image: 'Steve Nelson'http://www.flickr.com/photos/7171548@N04/2035853550Found on flickrcc.net

http://www.flickr.com/photos/7171548@N04/2035853550

http://flickrcc.net/

Do you get it?



Source: KS3 Computing POShttp://www.computingatschool.org.uk/data/uploads/secondary_national_curriculum_-_computing.pdf


Source: CAS - Computing in the National Curriculum – A Guide for Secondary Teachershttp://www.computingatschool.org.uk/data/uploads/secondary_national_curriculum_-_computing.pdf

SOLO


Prestructural “What’s binary?”

UnistructuralI can convert binary to denary.

I know that binary is ones and zeroes.

MultistructuralI can convert binary to denary & back again.

I can convert binary to ASCII.I know that binary is used to store data.

RelationalI understand how data is represented and stored on a

computer system.

Extended Abstract

I can see the big picture and start to understand/explain the reasons for using computers,

algorithms and file compression.

Lesson One

• Binary game – come up with a theory

• Binary dance off

• Paper exercises – converting one way and the other (overlearning)

• Appreciate the hard grind

• Homework – reinforcement.


http://forums.cisco.com/CertCom/game/binary_game.swf

Lesson Two

• More paper conversions?

• What if there was a quicker way? A program?

• Why would this be better for us?

• Introduce computational thinking – post it decomposition exercise.

• On to Scratch – create our converter.


Lesson 3


MrAColley (no spaces)

3 Step Differentiation

1. Pseudocode



2. Pseudocode with code blocks



3. Help Video


Progress in Scratch coding Progress in debugging

Help Video

Pupils copy simple blocks from code provided.

Pupils can independently spot that there is something wrong with their code but couldn’t tell you

where in the code the problem is.

Pupils copy simple blocks from code provided and can explain in their own words what it

does.

Code blocks

Pupils are given the blocks they need and use trial and error to combine them to achieve a

specific purpose.Pupils can independently spot that

there is something wrong with their code and can identify the block or place where it is wrong but cannot fix it without help.

Pseudo code

Pupils add simple extra blocks to existing code to modify the blocks effect. (eg Looks & Sound

Blocks)

Pupils reuse blocks of code that they learnt in class within their own similar program. Pupils can independently spot that

there is something wrong with their code and can fix it

Extra Challenges

Pupils combine reused blocks with blocks of their own devising (most programming is like

this).@MrAColley www.mrcolley.com

ASCII

• Secret messages

• Data representation

• Email

• Can build into networks


Phil Bagge

www.coding2learn.orgwww.bournetocode.com


Marc Scott

www.code-it.co.uk

#ictcurric

Nicki Cooper www.interactiveclassroom.net

http://csunplugged.org/Computer Science Unplugged

http://pamhook.com/Pam Hook (SOLO)

SSAT Computing Conference 2014 Workshop - Scratch Binary Converter

Education

Transcript of SSAT Computing Conference 2014 Workshop - Scratch Binary Converter