As you are working in PhotoShop this week, you should be preparing for a test which will be given next week---probably Tuesday. This test will show whether you can do the 'basics' we have learned thus far. You should be able to do the following:
crop for the best shot
rotate a canvas
free transform
straighten a horizon
create a vignette
create a decorative frame
do simple facial retouching
create depth of field/selective focus
warm up or cool down a color cast
clone
merge elements of two photos
use burn, dodge, and saturate
adjust levels and brightness/contrast
use unsharp mask
work with layers
work with filters
change a color photo to black and white
work with opacity
and you should know the basic theories of composition.
If you are having difficulties with any of the above techniques, ask for help!