The purpose of this guide is to give teachers and supervisors a working knowledge of various approaches to enhancing pupil learning about computer science, particularly through the use of Pascal. It contains instructional units dealing with: (1) computer components; (2) computer languages; (3) compilers; (4) essential features of a Pascal program; (5) Pascal variables; (6) data types and constants; (7) real and integer data types; (8) character and Boolean data types; (9) standard or built-in functions; (10) IF-THEN statements; (11) IF-THEN-ELSE control structures; (12) nested IF-THEN-ELSE statements; (13) programs involving IF-THEN-ELSE statements; (14) REPEAT-UNTIL structures; (15) WHILE-DO statements; (16) FOR-DO statements; (17) CASE statements; (18) standard files, input and output; (19) Eof and Eoln functions; (20) stepwise refinement; (21) inventory management; (22) functions; (23) local variables and side effects; (24) procedures without parameters; (25) procedures with parameters; (26) parameters in procedures and functions; (27) scope of an identifier; (28) forward references; (29) top-down design; (30) programming methodology; (31) program correctness; (32) recursive functions, part 1; (33) recursive function, part 2; (34) indirect recursion; (35) the Towers of Hanoi problem; (36) iteration vs. recursion; (37) user-defined scalar types; and (38) subrange types. (TW)