Structure of A TUTOR Lesson
A TUTOR lesson consists of a sequence of units where each unit begins with the presentation of information and progress from one unit to the next is contingent on correctly answering one or more questions. As with COBOL paragraphs, control may enter a TUTOR unit from the preceding unit and exit into the next, but units are also callable as subroutines using the do or join commands.
Here is an example unit from page 5 of the TUTOR User's Memo, March 1973 (Computer-based Education Research Laboratory, University of Illinois at Urbana-Champaign):
unit math at 205 write Answer these problems 3 + 3 = 4 × 3 = arrow 413 answer 6 arrow 613 answer 12Several things should be immediately apparent from this example.
- First, TUTOR is a fixed format language. Each line begins with a command name, with the arguments to that command (the tag) following, after a tab.
- In some cases, such as the write command above, the tag may consist of multiple lines. Continuation lines are either blank or have a leading tab.
- Screen coordinates are presented as single numbers, so 205 refers to line 2 column 5, and 413 refers to line 4 column 13.
What may not be apparent is the control structure implicit in this unit. The arrow command marks the entrance to a judging block This control structure is one of TUTOR's unique features.
Read more about this topic: TUTOR (programming Language)
Famous quotes containing the words structure of a, structure of, structure and/or lesson:
“... the structure of a page of good prose is, analyzed logically, not something frozen but the vibrating of a bridge, which changes with every step one takes on it.”
—Robert Musil (1880–1942)
“... the structure of our public morality crashed to earth. Above its grave a tombstone read, “Be tolerant—even of evil.” Logically the next step would be to say to our commonwealth’s criminals, “I disagree that it’s all right to rob and murder, but naturally I respect your opinion.” Tolerance is only complacence when it makes no distinction between right and wrong.”
—Sarah Patton Boyle, U.S. civil rights activist and author. The Desegregated Heart, part 2, ch. 2 (1962)
“When a house is tottering to its fall,
The strain lies heaviest on the weakest part,
One tiny crack throughout the structure spreads,
And its own weight soon brings it toppling down.”
—Ovid (Publius Ovidius Naso)
“All poetry is supposed to be instructive but in an unnoticeable manner; it is supposed to make us aware of what it would be valuable to instruct ourselves in; we must deduce the lesson on our own, just as with life.”
—Johann Wolfgang Von Goethe (1749–1832)