1. Binary pixel challenge 1
To know that pixels are stored as binary code and represented in RGB values

2. What is a pixel?
RGB Generator

3. Binary pixel challenge 1
Your challenge: To use the RGB app to match the colour values in RGB to each colour of the rainbow. Record each value and then convert to binary code.
(you may wish to use the pixel challenge support sheet to help you convert to binary)
Use a systematic approach when using the RGB app to make sure that you have explored all options. (All colours can be made using a mixture of Red, Green and Blue)
Introduce the task giving out as little information as possible. Allow pupils to try to complete the task and monitor their choice of code arrangements.
Encourage a logical approach and praise perseverance.
Pupils may develop a code that works up to the number 5 and then get stuck. Encourage them to think laterally using computational thinking skills to figure out a solution to their problem. Let them know that this skill is known in computing as debugging.
When pupils have tried for a sufficient amount of time, introduce the clues one at a time. Ask the pupils if they are ready for a clue and read the room to see if they are willing to try without clues.
Computational thinking skills
Abstraction - ignoring the information that isn’t needed
Decomposition - Breaking down into smaller parts that are easy to deal with
Pattern recognition - Finding patterns in decomposed parts

4. What is an alpha channel? How many bits make the colour white?
Binary pixel challenge 1
What is a pixel?
What is an alpha channel?
How many bits make the colour white?