Traditional models focus on teachers as being the sole providers of instruction.
The CLM argues that the aquistion of knowledge requires active participation. Students should observe and question topics that are of interest to them and then investigate those topics to construct their own understanding. By working in small groups, students share, critique, and defend their understandings. I have noticed, in my observations, that teachers are leaning toward more hands-on activities. However, I would like to point out that not all students learn best like this.