Collaborative learning is widely used in elementary classrooms. However, when working without technological support, some problems can be detected. We describe how weaknesses in coordination, communication, organization of materials, negotiation, interactivity and lack of mobility can be solved with a mobile computer supported collaborative learning environment with Handhelds interconnected by a wireless network. The collaborative activities, analyzed with and without technological support, are math and language activities for 6- and 7-year old children. The results of our work identify an effective way of using handheld computers to support collaborative learning activities that address the above mentioned weaknesses.