Abstract:
This paper presents a computer assisted instruction program for ESL/EFL which allows the students to review and practice certain spatial prepositions. These prepositions are TO, AT, (AWAY)FROM, AWAY FROM,, ON, OFF, IN , and OUT OF.The program offers a general explanation of these prepositions, which are divided into two main classes: prepositions showing movement and those showing position. Each category is divided into three subgroups according to whether they describe a one-dimensional, two-dimensional, or three-dimensional relationship. After the general explanation the student may choose to review each one of the subgroups mentioned above, which are accompanied by an exercise, or to go to a general test which deals with all the Prepositions mentioned above.The paper also describes the different procedures used in such a program. These procedures involved the use of arrays, DATA statements, and text files as well as subroutines dealing with scoring, pattern matching, right and wrong answer comments, and print formats. The latter control the display of the text on the screen while the previous ones are used to check the students' answers, give them immediate feedback, read the students answers, give them immediate feedback, and read the students scores. The program is written in Applesoft Basic.