Visually impaired Students

We have a Student starting in September who is visually impaired, does anybody know how to make all the icons on the screen larger. ------------------------------------------------------------------------ Sam Deakin and Andrew Nix St Pauls Catloic Hgh School Firbank Road Wythenshawe Manchester M23 2YS tel: 0161 437 5841 ext 168 fax: 0161 498 2030