Extended writing question and marking grid: specific heat capacity

This is a past paper extended writing question for GCSE Physics with a marking grid feedback sheet.
The marking grid has a space to write what went wells (WWW) and even better Ifs.
The grid also contains a SPAG section where the students can be given a grade for the level of SPAG that they have used, and a suggested way of improving their SPAG.
The levelled answers are to act as a mark scheme/ model answer.
This makes marking specific to the students and provides consistency and saves time.
Student feedback from using this model of assessment has been very positive.