This video explains step by step what happens when you enter a URL in your web browser. It covers looking up the IP address using the HOSTS file or DNS, connecting to the destination machine using TCP/IP, and using HTTP to fetch the page. It does a good job of breaking down the process into a series of simple steps that demystify this process for students (hopefully!).
This kinesthetic activity involves students acting out various parts of the Internet including websites, routers, servers, and clients. It starts by examining swtiching networks (e.g. telephone systems) before looking at routing networks such as the Internet.
This is quite a complex activity which requires some preparation and setting up, but when this is done it is an excellent way to help students understand these topics. Thorough instructions are given in three blog posts linked from the CSE4K12 page. It is also possible to vary the difficulty level by including fewer aspects, making it suitable for students of different age groups.
This activity was created for Computer Science & Engineering for K-12 by Gary Kacmarcik, and is licensed as Creative Commons Attribution-Share Alike.
Greg's Cable Map is an excellent site with an interactive map showing the location of major Internet backbones across the world. This is a great resource for helping students visualise just how Internet routing works.
This short video makes a good lesson starter or discussion prompt. It shows how fibre optic cables used for Internet backbones are laid beneath oceans. This is really useful for showing students that Internet routing is not a complicated or mythical process but, in fact, one which uses relatively basic technology.
This smart-looking Prezi presentation by Phil Bagge is packed full of great graphics and makes a really use introduction to the Internet topic. It takes a clear and visual approach to the idea of a 'network of networks', and really helps students see the structure of the Internet.
Creating a Website introduces students to creating correct HTML and CSS code without overwhelming them with details of uncommon or rarely used features. It is well laid out, enabling students to find example code for their particular requirements with ease, making it a useful reference book. However, it is not a tutorial or 'howto' book, so it needs using as part of planned lesson activities or independent projects.
In this video Computerphile explains the problems that cookies solve, why they are used on many modern sites, and how they work. It also discusses the difference between first party and third party cookies, and does a particularly good job of explaining how third party cookies raise privacy issues. The video also includes coverage of recent European legislation regarding cookies and user tracking.