Sci Starter is a site on which you can search for science lessons and other activities that you can use in your classroom or on field trips with your students. To see the full contents of every project on Sci Starter you will need to register on the site. Once you have registered you can search for lessons and activities according to topic and activity type. Many of the activities that I looked through include a collaborative aspect.

Applications for Education
If you’re looking for some new science activities that your students can work on together, register on Sci Starter and take a look at their offerings.

H/T to Vicki Davis.