An assessment for learning technique is highlighted which is suitable to benefit any key stage.
A Year 9 math class at the President Kennedy School in Coventry are placed in mixed ability groups and set a challenging problem that involves turning data into simultaneous equations
The students are told they only have three chances to seek help from the teacher.
The groups don't want to lose their "lifelines" so only call for assistance when they're absolutely stuck which provides a clear insight of where the real difficulties lie.
The technique also helps to encourage independent learning by handing responsibility over to the pupils.
Later, Philippa Cordingley, director of the Centre for the Use of Research and Evidence in Education, explains the use of this strategy supported by the research in this video.