Students who know procedural and object-oriented languages frequently have difficulty learning the functional paradigm. The purpose of this work is to facilitate this transition by designing and implementing a set of visual tools that help students understand how Scheme, a functional language, programs work. To achieve our goals we worked on the implementation of a Scheme interpreter and a set of visual tools for different key aspects of functional programming languages. Pilo Visualization Tools for Scheme (PVTS) emphasizes on the functional programming language paradigm and its visual representations. PVTS can be used by teachers as a teaching tool as well as by students as a learning tool.
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