How to learn APL
In the foreword of "A Working Introduction to APL", it is written:
I have long been struck by the contrast between the success with which the adventurous learn APL by simply using it, and the frequent failure of lecture courses to communicate the simplicity and applicability of the language.
Kenneth E. Iverson. Toronto, Ontario. July, 1981
These tutorials invite the student to play and explore with the language, and in doing so imbibe its principles so that it may feel natural to express problem solutions to the computer in the future.