Freeduc Primary, a live CD for primary school has recently been released. Freeduc is based on Knoppix and is, in short, a distribution of Linux that doesn’t require installation on a computer. As it is a Live CD, it runs right from the CD, and in this case, has many applications which are relevant directly to primary classrooms.
Of course, using a Live CD is beneficial as it requires less technical knowledge (just boot it up with your computer), and is usually able to get around any technical restrictions that have been setup on school computers (e.g., inability to install software). And of course, there is no cost to download and useFreeduc Primary. If you are a primary teacher, a parent of young children or someone involved in promoting technological integration, you need to check this out.