While many researchers have examined teacher participation and professional development in online networks and communities, few have looked at the factors and contexts that shape how teachers learn in these online spaces. Examining teachers' learning processes within these online spaces can yield important insights for scholars, school leaders,…

The concept of physical and chemical change is far from being the clearest and most self-explanatory concept in the world. If a number of chemists are asked to define physical and chemical change, there may well appear to be a fair degree of uniformity in their answers, until a few examples are suggested. When chemists are asked to place a variety…