<html><head><base href="x-msg://786/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div><div>1. The draw teachpack should be used with the HtDP teaching languages only. </div><div><br></div><div>I just did so and the following program runs just fine in Beginning Student Language. </div><div><br></div><div><div>(start 100 100)</div><div>(draw-circle (make-posn 30 30) 10 'blue)</div></div><div>;; there's nothing else in the Def area </div><div><br></div><div>2.  I recommend shunting the first two chapters in HtDP in favor of </div><div><br></div><div><a href="http://www.ccs.neu.edu/home/matthias/HtDP2e/index.html">http://www.ccs.neu.edu/home/matthias/HtDP2e/index.html</a></div><div><br></div><br><div><div>On Sep 19, 2010, at 2:24 PM, Jay wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div class="hmmessage" style="font-size: 10pt; font-family: Tahoma; ">Hello,<br> <br>I'm a complete newcomer to Racket. I've just begun working my way through HTDP, and have run into problems with exercise 6.2.1, which uses draw.ss. When I load the file, Racket complains when I make any reference to the "posn" struct (which is essential to all of the drawing tools), saying that it hasn't been defined. If I change tactics and try to start from the standard "beginner's" language (which does include the necessary "posn" definitions) and then copy over and run the declarations from draw.ss, that produces a "module not defined" error. I'd appreciate any guidance.<br> <br>Thanks for your time!<br> <br> <br>Jay<br>_________________________________________________<br> For list-related administrative tasks:<br> <a href="http://lists.racket-lang.org/listinfo/users">http://lists.racket-lang.org/listinfo/users</a></div></blockquote></div><br></body></html>