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AC9TDI10K03: Year 9 Technologies Content Descriptor – Data representation
AC9TDI10K03 Year 9 Technologies

AC9TDI10K03 – Year 9 Technologies: Data representation

Strand
Knowledge and understanding
Substrand
Data representation

This Content Descriptor from Year 9 Technologies provides the specific knowledge and skills students should learn. Use it to plan lessons, create learning sequences, and design assessments that align with the Australian Curriculum v9.

Content Descriptor

investigate simple data compression techniques

Elaborations

  • • using an algorithm to identify patterns in data and represent them in a compressed way, for example repeated pixels in an image with run-length encoding
  • • exploring the difference between lossy and lossless compression and the consequences of each, for example exploring codecs for audiovisual compression such as MP3, MP4 and WAV formats, considering energy requirements of file sizes
  • • examining an image and discussing whether the image quality would be compromised if all the blue pixels of the sky in one row were to be replaced by one token and the number of pixels it represents

Achievement Standard This Supports

This Content Descriptor contributes to the following Achievement Standard:

Year 9 ASTECTDIY910
Year 9 Technologies Achievement Standard
By the end of Year 10 students develop and modify innovative digital solutions, decompose real-world problems, and critically evaluate alternative solutions against stakeholder elicited user stories. Students acquire, interpret and model complex data with databases and represent documents as content, structure and presentation. They design and validate algorithms and implement them, including in an object-oriented programming language. Students explain how digital systems manage, control and secure access to data; and model cyber security threats and explore a vulnerability. They use advanced features of digital tools to create interactive content, and to plan, collaborate on and manage agile projects. Students apply privacy principles to manage digital footprints.