I really like using Diigo for that exact option. Really like how you can share sticky notes on sites w/just those in the class or group.

I covered Diigo & the groups function in my Discovery Education webinar last week.

I am just learning to use Diigo. Got started. Haven't got in the habbit yet. Thx for the link.

MarilynMcGeorge: I would be glad to help you out w/any questions regarding Diigo