This communication describes a pedagogical experience of collaborative writing online using Google Docs technology, held in the discipline of Natural Sciences, with students in a class of 8 years of schooling, a private education institution in the municipality of Santo Tirso. Was offered to students on an activity curriculum unit "Disturbances in the balance of ecosystems" which was a kind of index divided into themes, with each group to the development of a written work on one of the topics considered. The description, evaluation and results of experiments are presented and commented.