Hi, Cate,
Symbol World is the very best site I know of for students with learning difficulties. In fact, the pupils in my class who are able to use the computer independently visit it several times a week in their free time. The bright attractive layout and the easy navigation enable them get round the site without adult help, and of course, the symbols help them to understand its content. We love the new eLIVE magazine on Symbol world too. It is so refershing for my pupils to find a site they can understand and enjoy freely without needing an adult to help them to read it.
Vivien