Abstract
Instruction for computer literacy should concentrate on the conceptual foundation of computer use and not on the use itself. As an example the concept of function is chosen. The introduction and the use of functions with word and sentence problems show that this concept can be derived easily from natural language formulations. A sequence for extending the set of Logo primitives is outlined and the approach to functions with effects on the computer state is shown in some detail. An example on very elementary symbol manipulation demonstrates the ease and power of this approach with functions as building blocks.
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