Add problempack post.

diff --git a/posts/problempack.mdwn b/posts/problempack.mdwn
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+[[!template id=gitrepo repo=problempack]]
+
+I've put together a [[LaTeX]] package `problempack` to make it easier
+to write up problem sets with solutions for the classes I TA.
+
+problempack.sty
+---------------
+
+The package takes care of a few details:
+
+* Make it easy to compile one pdf with only the problems and another
+  pdf with problems and solutions.
+* Define nicely typeset environments for automatically or manually
+  numbered problems.
+* Save retyping a few of the parameters (course title, class title,
+  etc), that show up in the note title and also need to go out to
+  `pdftitle` and `pdfsubject`.
+* Change the page layout to minimize margins (saves paper on
+  printing).
+* Set the spacing between problems (e.g. to tweak output to a single
+  page, versions >= 0.2).
+* Add section level entries to the table-of-contents and hyperref
+  bookmarks (versions >= 0.3).
+
+The basic idea is to make it easy to write up notes. Just install
+`problempack.sty` in your `texmf` tree, and then use it like I do in
+the example included in the package.  The example produces a simple
+problem set ([[probs.pdf]]) and solution notes ([[sols.pdf]]).
+
+For a real world example, look at my Phys 102 notes [with][] and
+[without][] solutions ([source][]).  Other notes produced in this
+fashion: [Phys201 winter 2009][w09], [Phys201 spring 2009][sp09], and
+[Phys102 summer 2009][su09].
+
+wtk_cmmds.sty
+-------------
+
+A related package that defines some useful physics macros (`\U`, `\E`,
+`\dg`, `\vect`, `\ihat`, ...) is my `wtk_cmmds.sty`. This used to be a
+part of `problempack.sty`, but the commands are less general, so I
+split them out into their own package.
+
+wtk_format.sty
+--------------
+
+The final package in the `problempack` repository is `wtk_format.sty`,
+which adjusts the default LaTeX margins to pack more content into a
+single page.
+
+[with]: http://www.physics.drexel.edu/~wking/courses/phys102_s08/notes/rec1_sols.pdf
+[without]: http://www.physics.drexel.edu/~wking/courses/phys102_s08/notes/rec1_probs.pdf
+[source]: http://www.physics.drexel.edu/~wking/courses/phys102_s08/latex/notes/rec1/
+[w09]: http://www.physics.drexel.edu/~wking/courses/phys201_w09/source/
+[sp09]: http://www.physics.drexel.edu/~wking/courses/phys201_s09/source/
+[su09]: http://www.physics.drexel.edu/~wking/courses/phys102_sum09/source/
+
+[[!tag tags/code]]
+[[!tag tags/latex]]
+[[!tag tags/teaching]]

diff --git a/posts/problempack/Makefile b/posts/problempack/Makefile
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+REPO = http://www.physics.drexel.edu/~wking/code/git/problempack.git
+PACKAGE = problempack
+
+.PHONY : all checkout clean
+
+all : probs.pdf sols.pdf
+
+clean :
+       rm -rf $(PACKAGE) *.pdf
+
+$(PACKAGE) : 
+       git clone $(REPO) $@
+
+checkout : $(PACKAGE)
+       git --git-dir $(<:%=%/.git) --work-tree ../ pull
+
+%.pdf : checkout
+       $(MAKE) -C $(PACKAGE:%=%/test) $@
+       cp $(PACKAGE:%=%/test/$@) $@

diff --git a/tags/teaching.mdwn b/tags/teaching.mdwn
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+Teaching pages (Physics and related topics).
+
+[[!inline pages="link(tags/teaching)" show=10 actions=yes]]