Just a quick capture from my Maths lesson this morning. Kids were struggling with how to set out percentage problems in their exercise books so I created a replica of how to do it on the IWB. Kids then worked through the problem themselves on the board and used the attached calculator as well to check the final answer. This assists greatly in getting the message across that Maths isn't just about the answer but demonstrating and understanding the process - all annotations are by two students in the class demonstrating to the others. Note the virtual ruler as well at the top - a manipulative to show proper setting out. With this tool, the class reaches a common understanding of expectations.