Nucleophilic addition reactions for aldehydes and ketones AQA new specification.

A microteach interview lesson that got me to the interview. An interesting revision lesson on aldehydes and ketones. The task revolves around 4 graded worksheets that the students complete based on their current knowledge - they determine this at the beginning of the lesson by reading the learning objectives on the powerpoint. These are:
Grade A/A*
To explain why nucleophilic addition reactions with acidified KCN can produce enantiomers.
Grade B
To outline the nucleophilic addition mechanism for the reaction of KCN followed by dilute acid.
Grade C
To describe the mechanism of nucleophilic addition for reduction reactions with NaBH4 (where H- is the nucleophile)
Grade D:
To describe the reactivity of aldehydes and ketones in terms of the position of the carbonyl group.

Help sheets can be provided using the A-level CGP revision guide for this specification.
In the word documents, these are the tasks (the grade A is a powerpoint), the first sheet contains the answers- the mechanisms need to be drawn out on the answer sheets and the sheet photocopied for peer-assessment.

The plenary is an exam question aimed at that level, you will have to find these for yourself, as I cannot include these for copyright reasons.