science theme: chemergy:chemistry and science clubbing in synergy
math theme: unraveling complex systems
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Chemergy: Chemistry and Science clubbing is a Synergy
theme for 2011 science and math
for math week, it's "Meeting the Challenge of K-12"
May 2011 has Friday the 13th.
XXX/IV/MMXI (in UK date then month) IV/XXX/MMXI (in USA month then date)