Abstraction

Lesson Instructions

Watch and follow the YouTube video, the lesson contains three parts:

  1. Key Information and content - all you need to do here is watch and listen. We recommend you take some notes for this one!

  2. Learning activity - You are to complete an abstraction exercise using an aerial photo of Alcatraz prison to create a map.

  3. Consolidation - these are past exam question and are for deliberate practice to check your understanding.

Task - Map Design Activity

Abstraction Activity

Task - Exam Questions - Deliberate Practice

Exam Questions - Web

Mark Scheme

Question 1 (a) (i)

1 mark per bullet to max 2

  • Obscuring of unnecessary detail

  • So the main processes / data can be more easily understood / focused on

Do not allow simply "removing detail" or "ignoring sections" etc

For second bullet point, allow answers related to concentrating on "the important bits"

Question 1 (a) (ii)

1 mark per bullet to max 2

  • To reduce complexity of the student representation...

  • ...to therefore make the implementation simpler / more efficient / quicker

Question 1 (a) (iii)

1 mark per bullet to max 2. Mark in pairs.

e.g.

  • Teacher would hold details of marks/grades....

  • ....kitchen system would not need academic information

  • Kitchen may hold details of food allergies / school meal choices / payment information....

  • ...teacher would not need information about dietary requirements

Allow sensible answers where a reasonable difference between the two representations is clearly stated, with one mark awarded for each side of the explanation.