Great! Lots of other good, similar things in xkcd. As it calls itself, it's "A webcomic of romance, sarcasm, math, and language."
I'm 44 and remember the Texas Sesquicentennial in 1986. I also had an 8th grade English teacher who really pushed etymology and used Word Power Made Easy (I should order some for my kids!). So when I took a "Greek and Latin Elements in English" class in college (for fun!), it was a good refresher.
I completely agree with studying the roots as a way of learning. I read a book that focuses on exactly that type of learning and found it rather fruitful [link for interested]: http://www.amazon.com/Word-Power-Made-Norman-Lewis/dp/067174190X/ref=pd_rhf_p_t_1
My posters also include words that relate to general knowledge or are references to something, like 'blue blood', 'Gish Gallop' and so forth. I usually find this kind of words particularly interesting and studying roots usually does not incorporate them into the learning process.
> Can someone guide me how to improve my grammar/verbal/vocab for GMAT.