There are ways to design a Moodle page so that each module has it's
own separate space. However, most Moodles are laid out the way we
are, so I wanted to expose you to the standard look.
You are seeing everything because you are in instructor mode.
You can make the student view much less cluttered. I
just 'grayed' out module 3. If you switch to student view
you'll see how different things look.
Dennis