Going by last years paper which I've used for revision I reckon:
Non calculator
Designing data tables
sampling
Area
converstion graphs
stem and leaf diagrams
substituting numbers into formulas
Time questions
expanding
factorising
rearranging formulas
transformations
Working out the best deal using percentages
Working out angles in shapes
Volume
interior and exterior angles in polygons
Bearings
cumulative frequency graphs, median, IQR and box plots
simplifying expressions
standard form
probability trees
simultaneous equations
circle geometry
Histograms
algebraic fractions
turning recurring decimals into fractions
Calculator
parallel lines
Rounding calculator answers to decimal places or significant figures
Designing questions and giving criticisms
Straight line graphs
Working out best value for money
Scatter graphs
Transformations
Converting money from pounds to another currency eg: euros
inequalities
Trial and improvement
Relative frequency
Estimating the mean from a frequency table
Simplifying, expanding and factor using more complex expressions
solving equations
Working out best value for money using percentages
Trigonometry
Compound interest and depreciation
Pythagoras
Quadratic equations
Stratified sampling
Sin and cosine rules
probability trees without replacement
Vectors
I'm taking this exam this year too. I just hope we get as many handling data and statistic questions as possible as it is the area I'm best at. Good luck for June