A little context.
I designed this task for my 10x5 students. They find science and maths difficult and all are the most forgetful students I have ever taught. They are robust and willing and richly deserve some success. Every calculation I have done with them , has been very difficult and the prospect of having to perform a three part calculation on something as abstract as specific heat capacity was a little daunting. However, this worked, and one student even could rearrange the formula to calculate mass, specific heat capacity and temperature change.
Why I think it worked.
This for me is a clear success of the bar model, which provide a student friendly (and owned) scaffold for this calcualtion.
Ben Rogers excellent blog posts really helped.
Other features that supported the students in their learning was:
1. Managing the complexity of the task.
2. Increasing the number of operations the students had to do to complete each calculation.
4. The use of examples.
5. Removal of scaffolding.
I have tried to annotate a students worksheet to show where these features apply.