Marking and written feedback in science

Feedback sits at the top of Professor John Hattie’s table of effect sizes on education performance. Written feedback is an important part of the overall feedback machine and gives teachers a unique opportunity for a 1-1 with students, allowing feedback to take place in both directions.  So, what does effective written feedback look like in science education? Below are some of the dos and don’ts of written feedback. Some ideas have been taken and adapted from Black and Wiliam (1998).

Please download the blank quadrants to use in your own training sessions on written feedback.

Effective written feedback in science

Do make sure:

  • you set tasks that are sufficiently diagnostic to facilitate useful feedback from an expert
  • feedback is phrased in a way that students can understand and is relevant to future work 
  • pupils are trained in how to respond to the feedback and this is routinised
  • the feedback between pupils and a teacher is thoughtful, reflective and focused to evoke and explore understanding of key concepts 
  • each student is given the opportunity and help to work at improvements in class and that the teacher has time to review this in the lesson 
  • you write feedback near where the error occurs in the text
  • you annotate a blank copy of the task with common errors/misconceptions as you mark to inform whole class feedback, perhaps as a Do Now in the next lesson.


  • write standalone questions that don’t refer to the work just marked
  • give overly specific feedback that only relates to that piece of work – pick out the feedback that is going to enable success in future work 
  • make comparisons with other pupils
  • comment overly on quantity and presentation; learning is the important bit!
  • overemphasise grades and marks
  • get into lengthly written dialogues with studenets.
Further reading
  • Black, P. and Wiliam, D. (1998). Inside the black box: Raising standards through classroom assessment. Granada Learning.
  • Elliott, Victoria, et al. (2016). A marked improvement? A report from the Education Endowment Foundation.
  • Wiliam, D. (2016) Mr Barton Maths Pod Cast


  1. Peer assessment in science
  2. Assessing scientific skills in science
  3. Summative assessments in science
  4. Question level analysis
  5. Written feedback in science