These are some other college assignments I've done.
Photoshop basic tools:
Slash
Frankie
Photoshop: pen tool, levels, curves, blur filters, other filters
Bumblebee
Extreme Sports
Photoshop: clone stamp tool, healing brush, patch tool, etc
Digital ICE
Photoshop: brushes, hue/saturation, brightnes/contrast, sponge tool, etc
Nature Conservancy