Added: 11/29/2011 Good interactive lab that allows students to change the variables in a population of competing birds, and see the effects on their respective populations and on that of their mutual predator, the hawk.
Added: 11/29/2011 Good simulation for demonstrating community fluctuations. Allows students to manipulate different variables and observe the effects they have. Also uses tree species found in northeastern united states, so it has practical applications.
Added: 11/29/2011 Nice interactive tutorial that introduces a few terrestrial biomes while also allowing them to play some small educational games. Gets students motivated in their own learning.