#1 Observe

#2 Measure

#3 Draw

#4 Mechanics and Science

#5 Online & reference CD's

#6 Final assess

Resources

Extra Science

Links to samples etc.

Objectives:
Students will be able to draw a 3 dimensional visualization of their scale model. The importance elements are to be able to allow "transparent" views of the inside, so the visible front of the machine is not the central focus.

Introduction to 3-D drawing and Geometry:
If you have the capacity to put kids on the internet, or display sites on TV or screen, the following site lets them interact with several forms of 3 dimensional geometric drawing.
http://mathforum.org/workshops/sum98/participants/sanders/Geom3D.html

I let them spend a period exploring this website, and saving several of the geometric renderings to use as references. The point here was to let them internalize the process, to begin to see how flat display can be made to show depth.

Core Lesson: Show two sides, with interior view as central focus.

In discussing and trying quick drafts of the machine on the board, we realize that the machine is taller than we are, so we don't see the top or bottom of it, which leaves just two sides for viewing. (good, that makes it easier!) .... Some students still want to show it as an isometric drawing, .... that's okay, but I ask them to choose that view only if it assists in showing their internal designs.

Basically, Students are choosing either 1 point, or 2 point perspective drawing.
http://mathforum.org/workshops/sum98/participants/sanders/1ptPersp.html

Useful Visualization Resource:This year I showed a photo some students took with digital camera, mainly to give them a perspective shot for drawing the cube model shape. (sent photo to TV from av equipped Mac...or you could print it on a transparency if you have the right printer.)Sample photo

Now they have the box...... the shell of their model...... what is going on inside??

Lesson 4:Lasers, mechanical men, and refrigeration