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==History==
[[Matthias Felleisen]] and [[Racket (programming language)|PLT]] began the effort in January 1995, one day after the ''[[Symposium on Principles of Programming Languages]]'' (POPL), in response to Felleisen's observations of his [[Rice University]] freshmen students and the algebra [[curriculum]] of local public schools. His objective was to use [[functional programming]] to
The effort began using a [[programming language]] named PLT Scheme
The group raised funds from several private [[Foundation (nonprofit)|foundations]], the [[United States Department of Education]], and the [[National Science Foundation]] to create:
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Here is an example:
<
(require 2htdp/universe)
(require 2htdp/image)
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(animate create-image)
</syntaxhighlight>
This short program simulates an apple falling from the top to the bottom of a small white canvas. It consists of three parts:
* A function definition for create-image, which is a one-line function in mathematics, assuming an algebra of images with place-image, circle, and empty-scene have been introduced
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For example, a journalist benefits from a similar process: figuring out the major concepts in a story; creating a headline; lining up examples and specific data; organizing the article about the story of the givens and how the story unfolded; writing; and fact checking.
The data dimension can be summarized by the maxim ''the shape of the data determines the shape of the code and tests.'' For example, if the input or output data type has three variants, a test suite should have at least one test case from each variant, and program code will probably contain a three-way conditional (whether explicit or hidden in a polymorphic dispatch). If the input or output data type has three fields, a test suite will have to specify values for those three fields, and program code will have to refer to those three fields. If the input or output data type has a simple ''base case'' and one or more self-referential variants, the test suite should include a base case and one or more non-base cases, and the program code will probably have a base case and one or more self-referential cases, isomorphic to the data type. The technique of [[recursion]], rather than being mysterious and scary, is simply applying already-learned
Organizing the givens is the task of translating the descriptions of data into a program skeleton. Each form of description determines a specific form of program organization. The transformation is nearly mechanical and helps the students focus on the creative part of the task.
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==Bootstrap==
In 2006 PLT, at Northeastern University and [[Citizen Schools]] from Boston, made joint efforts to reach out to inner city students with after-school programs. Citizen Schools is a nationwide organization that matches volunteers with after-school program sites and gets them started with scripted curricula. The goal of the effort is to translate the material into a sixth-grade curriculum. The first few tests were a great success in Boston.<ref>{{cite news |url=http://www.boston.com/yourtown/news/dorchester/2011/05/bootstrap_program_pulls_up_rox.html |title=Bootstrap program pulls up Roxbury, Dorchester middle-schoolers |work=Boston.com
==References==
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