The links below will help you understand how to develop your pupils’ numeracy skills in a chemistry/science context. Remember to have a discussion with colleagues in Maths to see if their is a preferred method that they use for certain calculations.
The Language of Mathematics in Science: A guide for teachers of 11-16 science
The Language of Mathematics in Science: Teaching Approaches
Maths for Chemists – comprehensive book explaining the use of numeracy in chemistry (from BGE up to Adv. Higher level)
RSC online course to develop your numeracy skills
Planned in Scotland for Teachers in Scotland online CPD on calculations: