pictures change around for some reason

[blue5]

hey im having a bit of problem im in charge of our school's website and on the website for some reason like 2 or 3 pictures will switch around and it's different every time you go to it heres the url: www.exira.k12.ia.us

[1scrollnet]

I really did not understand, what images switch? do you mean they change or what? and can you give the page exactly in the website?