If students in a class are all setting different targets what sort of learning intentions do we need to set (whole class, individual)?

The effects are stronger at the individual level, but the ways of setting and monitoring targets can be taught as a class unit. To manage this effectively, students who have common needs can be grouped together and taught as a small group. Often targets are set around a common need which allows the teacher to set a more global learning intention and differentiate through the success criteria. For example, the whole class may need to focus on punctuation with one group of students learning to use capital letters and full stops correctly with another group learning to use semi colons commas for phrasing.