Here is the text part of the document I received from Loma Linda. I couldn't paste the image portion for obvious reasons.
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Loma Linda University
School of Dentistry
Manual Skills Practice Exercises
Equipment and Supplies Needed:
1. X-ACTO KNIFE #1 ? Comes as X-Acto handle and one pointed blade and a #17 lightweight Chiseling Blade
2. Sidewalk chalk -- Chalk sticks are four inches long and approximately one inch in diameter in assorted colors.
3. A ruler that has a millimeter scale and sharp pencil.
Carving exercises
The carving of the chalk or plaster can be messy, so you will want to protect your clothes and surrounding area.
The exercise should be one that will test manual dexterity and accuracy of dimension, and absence of critical errors. Therefore, the dimensions and design suggested should be followed explicitly. Other designs may be created by the carver, but they should be designed so that there are specific dimensions to be carved to.
The manual skills test given by the Loma Linda University School of Dentistry as part of the admissions process is a design that is evaluated according to the following:
1. All surfaces must be flat and smooth
2. All angles are to be sharp and defined
3. Measurements are to be exact
4. External angles are to be free of chips
5. Internal angles are to be clean and sharp
Helpful Hints
With a sharp pencil, draw design using dimensions given. You may only want to draw one section of the design at a time so that you do not smear your lines while carving a different section.
To cut out or carve an area, lightly score around the entire design section with the pointed blade 1mm inside of drawn line. Do this a second and third time applying more pressure each time. The purpose of doing this is to prevent chipping on the outside edge of the finished carving.
Now place the square chisel type blade in the x-acto handle and proceed to shape the design as pictured. Most of the carving and shaping will be accomplished by using the square chisel blade.
Leave some time for final refining and sharpening of design. Carve to final dimensions.
Practice time for the exercise is 1.5 hours, which includes drawing the pattern and carving the design to the best of your ability and as accurately as possible.
) you will begin to understand. Of course, few people come in with golden hands; everybody has to work hard. But by using these tests to weed out the truly hopeless, the schools are doing both themselves and the students a favor. 
