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"uilding a giant steel bale feeder is hard. Try it. Problem No. 1: Unless you live in ranch country, you probably don't even know what it's supposed to look like - regardless of whether you can build one. Problem No. 2: Arc welding is involved. Problem No. 3: Getting it right requires some serious math."

Asymptopia Crossword Builder is a JavaScript education application that runs in any modern internet browser but does not require an internet connection. The simple controls allow teachers or parents to create unlimited math crosswords, or supply their own word:hint pairs. Support has recently been added for French, Spanish, pt-Brasillian, Kiswahili, and special characters (accents, tildes etc), in general. Some suggested uses include: cities, countries, lattitudes and longitudes to teach geography and spherical trig, simultaneously; Periodic table word:hint pairs; Language[i]:Language[j] word:hint pairs, for foreign language learning exercise; Terminology practice with virtually any other subject.