+## PLEASE REPORT PROBLEMS (AND SOLUTIONS!) ##
+
+We haven't tested these instructions ourselves, and they're not explicit
+step-by-step instructions in any case. If you encounter troubles, please email
+to let us know so that we can amend the instructions to help others. If you
+figure out how to fix the problem youself (and please do), please also write
+with suggestions how we can change these instructions to make the process
+easier and more straightforward for others.
+
+
+## Getting Scheme ##
+
+**Scheme** is one of two major dialects of *Lisp*, which is a large family of
+programming languages. The other dialect is called "Common Lisp." Scheme is the
+more clean and minimalistic dialect, and is what's mostly used in academic
+circles.
+
+Scheme itself has umpteen different "implementations", which share most of
+their fundamentals, but have slightly different extensions and interact with
+the operating system differently. One major implementation used to be called
+PLT Scheme, and has just in the past few weeks changed their name to Racket.
+This is what we recommend you use. (If you're already using or comfortable with
+another Scheme implementation, though, there's no compelling reason to switch.)
+
+Since the name change is so recent, you're likely to run across both sets of names.
+
+PLT/Racket stands to Scheme in something like the relation Firefox stands to HTML. It's one program among others for working with the language; and many of those programs (or web browsers) permit different extensions, have small variations, and so on.
+
+PLT Scheme had several components. The two most visible components for us
+were the command-line interpreter "mzscheme" and a teaching-friendly editor/front-end "DrScheme". In
+Racket these have been renamed "racket" and "DrRacket",
+respectively.
+
+* In your web browser:
+
+ There is a (slow, bare-bones) version of Scheme available for online use at <http://tryscheme.sourceforge.net/>.
+
+
+* **To install in Windows**
+
+ Go to <http://racket-lang.org/download/>. Download and install the "Windows x86" version.
+
+* **To install on Mac without MacPorts**
+
+ Go to <http://racket-lang.org/download/>. Download and install the option for your system, most likely "Macintosh
+ OS X (Intel)"
+
+* **To install on Mac with MacPorts**
+
+ You can install a command-line version of
+ PLT Scheme (dating from early 2009) by opening a Terminal
+ and typing: