How did you do? Number 1 was probably easy - the Great Egret. They tend to have dark to black legs and feet, and their bill is not as heavy as a Great Blue Heron.
Number 2 is a little more difficult. It is actually a juvenile Little Blue Heron. The adult is at left here.
Number 3 is a Cattle Egret. The tip off on this one is that it is in breeding plumage with that peachy color on the head and chest.
Number 4 is a Snowy Egret. Though it is similar in size to a Cattle Egret, it has a black and yellow bill, and black and yellow legs.
Number 5 is a specialty that I only see in Florida. It is actually a white morph Great Blue Heron, often called "Wurdemann's" Heron. One of the ways I can tell this bird from a Great Egret is the very heavy bill in proportion to the rest of the head.
I also threw in a photo that had two species together - the Great Egret and the Snowy Egret.