file size. Resources ‘Honey I Use the ‘Honey I shrunk the data!’ animation and game to introduce three different shrunk the strategies for shrinking data – ‘keep them all and make them small’ (lossless), data!’ ‘squeeze them more and open the door’ (lossy) and ‘save the best and scrap the rest’ animation and (superchannel): . Discuss with the class the pros and cons of each strategy. Make game sure that students understand the key difference between lossless and lossy compression techniques, i.e. that the former retains all the original data while the latter permanently discards some of it. ‘Run Length Show the YouTube video ‘Run Length Encoding Visualization’ to introduce the concept Encoding of Run Length Encoding (RLE): Visualisation’ YouTube video Give students the opportunity to experience RLE compression in action by decompressing a 4-bit colour image encoded using RLE (Activity 2.1.3). Read the binary numbers aloud to students or give them the binary codes to read for themselves (see endnote ). Homework: Ask students to complete Activity 2.1.4. Stage 1: NEA Preparation: Introduce the NEA Prep lessons (use lesson summaries). SAM NEA 2 Analysis Requirements Go thought the differences between the preparation session and the ‘real thing’. Specification Discuss the restrictions there will be when completing the real NEA (page 15 Security, NEA Delivery and page 35 in the specification). Guide (use for
file size. Use the ‘Honey I shrunk the data!’ animation and game to introduce three different strategies for shrinking data – ‘keep them all and make them small’ (lossless), ‘squeeze them more and open the door’ (lossy) and ‘save the best and scrap the rest’ (superchannel): . Discuss with the class the pros and cons of each strategy. Make sure that students understand the key difference between lossless and lossy compression techniques, i.e. that the former retains all the original data while the latter permanently discards some of it. Show the YouTube video ‘Run Length Encoding Visualization’ to introduce the concept of Run Length Encoding (RLE): Give students the opportunity to experience RLE compression in action by decompressing a 4-bit colour image encoded using RLE (Activity 2.1.3). Read the binary numbers aloud to students or give them the binary codes to read for themselves (see endnote ). Homework: Ask students to complete Activity 2.1.4. Resources ‘Honey I shrunk the data!’ animation and game ‘Run Length Encoding Visualisation’ YouTube video 2 Stage 1: Analysis NEA Preparation: Requirements Introduce the NEA Prep lessons (use lesson summaries). Go thought the differences between the preparation session and the ‘real thing’. Discuss the restrictions there will be when completing the real NEA (page 15 Security, and page 35 in the specification). SAM NEA Specification NEA Delivery Guide (use for
gcse-cs-autumn-term-year-11-scheme-of-work.docx