Understanding and learning outcomes

http://www.gardnercampbell.net/blog1/?p=2239

Students will … students will … students will … students will. (Meantime the students’ will becomes defined for them, or ignored, or crushed.) Each of the above statements assume a linear, non-paradoxical, cleanly defined world.
For it turns out that two of the words we must never, ever use are “understand” and “appreciate.” These are vague words, we are told. Instead, we must use specific words like “describe,” “formulate,” “evaluate,” “identify,” and so forth.