Blogging with students, and for supporting student learning is one way to develop 21st Century skills. Take traditional essays, opinions, and multimedia projects that occur in classrooms, and post them on a classroom blog, or a blog maintained by each student. The conversation opportunities are enormous. Feedback is considered to be one of the top ways to improve student learning ("Setting Objectives and Providing Feedback",Classroom Instruction that Works, Marzano, Pickering, and Pollock). Security can be a concern, except that many blog sites have security tools that, for example, only allow posts by registered users, or users who have been approved or screened by the blogger. Teachers might use a blog to provide information or incorporate activities and resources for students and parents.