The fifth lesson in a sequence of lessons that challenge students to think about different ways that plain text can be converted, encrypted or coded into cipher text. This lesson introduces the Playfair cipher. This is a more challenging lesson to think about than the previous lessons and may need to be significantly differentiated for younger or students with additional educational needs.

This is the third lesson in a series of lessons about ciphers and encryption. In this lesson, students consider why a simple cipher such as the Caesar cipher is inappropriate for internet encryption and look at a more complex cipher method. They are also introduced to the world of code breakers during World War II and the work of Alan Turing.

This lesson is the 4th in a series of lessons designed to improve students’ understanding of how networks are organised. In this lesson students develop their understanding of key vocabulary such as IP addresses and the role of the router in transferring data between computers. It involves recall of key information from lesson 2 in the unit. Students are asked to describe the handshake process, discuss the format of data packets, and consider possible errors in transmission of data. This lesson is provided in PPTX, PPTS, PPT formats. The learning mat is provided in PPTX, PPT and PDF formats. Some animation and image features may be lost in PPT formats. A homework task is also included in this lesson.

This lesson is the 5th in a series of lessons designed to improve students’ understanding of how networks are organised. In this lesson students consider a range of different features of wired and wireless networks and how they impact on the performance of the network. Students should be taught to be critical about real life situations and apply their learning in this lesson to explain which type of network is best for which type of situation. This lesson is provided in PPTX, PPTS, PPT formats. The learning mat is provided in PPTX, PPT and PDF formats. Some animation and image features may be lost in PPT formats.

A complete lesson and the first lesson of a unit designed to encourage students to understand how and why networks are used. This lesson is focused on the benefits and drawbacks of using a network but also covers the differences between client-server and peer-to-peer networks. The resources include a 'takeaway menu ’ of homework tasks, a selection of possible bell work activities as well as a fully detailed lesson plan and learning mat for students to demonstrate their understanding of the topic. LP in pptx, ppt and pps formats (though some image and animation functionality is lost in earlier versions of PowerPoint. LM, bell work and homework s PPTX, PPT and PDF formats

This is the second in a sequence of lessons that introduce students to the principles of network organisation and the reasons why networks are used. This lesson looks at the differences between LAN and WAN, introduces the idea of a PAN, and also considers the role of the router in creating a LAN. The lesson plan is provided in PPTX, PPTS and PPT format, although some image and animation settings lose functionality in the older version of PowerPoint. The learning mat (worksheet) is also available as a PDF version. This will print on A3 paper.

This lesson draws the whole unit to a close. During the unit students will have studied the different hardware and software components that make up a computer system. You should use one lesson to set the assessment task and then use this lesson as an opportunity for Dedicated Improvement and Reflection Time (DIRT). Students will understand the correct answers to the questions on the assessment, and then complete 3 targets set by the teacher in their feedback. The lesson plan is provided in .PPT, .PPTS and .PPTX format, while the learning mat or assessment sheet is provided as PPTX, PPS and PDF.

LO: To construct expressions involving file size, transmission rate and time for calculating network speeds. This lesson is the 6th in a series of lessons designed to improve students’ understanding of how networks are organised. In this lesson students focus on the mathematics involved in calculating network speeds, file sizes and time taken to transmit data. Students are asked to recall learning about units used for measuring file sizes. This lesson reflects on the need for accuracy and questions involve units such as MiB, GiB and TiB. This lesson is provided in PPTX, PPTS, PPT formats. The learning mat and homework sheet is provided in PPTX, PPT and PDF formats. Some animation and image features may be lost in PPT formats.

This is a busy lesson and is fourth in a sequence of lessons that consider how computer systems integrate hardware and software. In this lesson, students consider what happens in the CPU during the fetch-decode-execute process. This lesson may need to be differentiated for some classes. There is an opportunity to consider how the registers work using the little man computer model using an online model. The lesson plan is provided in PPTX, PPTS and PPT format although some functionality (such as the video screen grab) is lost in PPT format so the screen grab is also provided separately. The worksheet (learning mat) is provided in PPTX, PPT and PDF formats.

This lesson is the third in a sequence of lessons that exposes students to activities that will help them understand how the different components in a computer system interact and communicate with each other. This lesson focuses on the different types of internal main memory in a computer, that are used to start up and keep the computer running. Students learn about the differences in functionality and purpose of ROM, RAM and cache memory. The lesson plan is provided in PPTX, PPTS and PPT format, though some functionality in the PPT file may be lost. The worksheet (learning mat) is provided in PPTX, PPT and PDF format.

This lesson builds on learning from previous lessons related to binary numbers and binary arithmetic. In this lesson, students will consider how a computer can manipulate binary numbers and multiply or divide by powers of 2. This is a skill required for the Edexcel GCSE Computer Science course but the lesson can be adapted for other groups or courses. Learning Mat (LM) Worksheet is supplied as PPT, PPTX and PDF formats. Lesson Plan (LP) is supplied as PPT, PPTX and PPT Slideshow. Note that PPT files may lose some functionality.