Following the positive feedback we received for our special issue on mathematics teaching last summer (Teacher Plus, May-June 2009), we decided to bring out another subject-specific special issue this year, and one of the ideas thrown up was biology. To bring a fresh perspective to the process and the product, we invited Geetha Iyer to help us with the issue and play the role of guest editor. Geetha has had a long and varied experience as a teacher, teacher trainer and materials developer, with a deep commitment to making science teaching more relevant and creative. With a very sketchy brief from us, Geetha worked on this issue, planning the content, identifying contributors and coordinating with them to bring in the material, and making a final judgment on suitability and presentation. For us at Teacher Plus, it was an enjoyable and satisfying collaboration. We were able to draw in new contributors, and therefore introduce to our readers a new set of voices. Interacting with Geetha, and working through editorial decisions together has also led us to look at our approaches differently. The cover, for instance, was settled on after nearly 15 iterations, with each of us throwing in our ideas and objections to the various options developed by Kumar, our designer. Ultimately we arrived at a design that pleased all of us, and one that we hope will please our readers, too! We trust that our readers will enjoy and gain from what’s inside the cover, too!