While it is possible to get worm densities up to as much as 20 kg/m 2 or 4 lbs per square foot (Edwards, 1999), the most common densities for vermicomposting are between 5 and 10 kg/m 2 (1 to 2 lbs per ft 2).
A massive open online course (MOOC) is a model for delivering learning content online to any person who wants to take a course, with no limit on attendance. A short video about MOOCs and the connected age. Recent Spotlight.
spoc Instructors: A Small Private Online Course for your classroom A SPOC is a private clone of our EdX MOOCs, CS169.1x and CS169.2x, that is open to enrollment only for your own students and in which you can appoint your own co-instructors or teaching assistants.