Illustrations for engineering text book

Design details: Please find attached 17 sketches .Salient points are:

1. I have put 'instructions/guidance notes' in red pen with
bubble-cloud round them.
2. I need to stick to black/white/grayscale - so no colour.
3. I have referred to 'stickman' a few times. I am just looking for a
simple outline of a person ( a bit like a morph character ) to be
people. This is similar to the person with a pen on slide 3 - under
defining. Hope this is clear.
4. In some slides I have used blatent clipart images - I am hoping
that you can improve on these
5. Sometimes I havve downnloaded a picture which represents the
concept of what I want, but needs a new drawing - hopefully the notes
will be clear enough.
6. I need to add some bits and pieces to slide 11, once I have the background.
Ideas for the visual style: Illustrations to be consistent
Preferred colors: Grayscale
Where the design will be used: Undergraduate text book
Extra notes: There will be about 12 more illustrations - these will be paid for seprarately