These examples give some of the natural crossover points between maths and science for students in the 1116 year age range.
Age 
Science (with reference to GCSE syllabus) 
Maths (with reference to UK National Curriculum levels) 
1112 
Variation (Biology) 
Bar charts/line graphs (L36) 
1112 
Mass & Weight, Speed, Pressure 
Reading scales (L34) 
1112 
Forces :Hooke's Law, Friction, Speed. Direct proportion as a concept appearing. From a maths viewpoint links to initial use of equations and basic algebraic substitution. 

1112 
Classification & food webs Could link the idea of classification in Science to classification of 2D shapes or quadrilaterals in maths. Statistics built in with the science content through use of data collection with quadrants, calculating averages when investigating the food webs. Possible connections to area as well e.g. estimating areas of different size leaves. 

1112 
Sc uses trolleys and lightgates to calculate speed. Sc could make a video of this the next time it happens for Ma to use to help the pupils recall this. 

1113 
Negative numbers for boiling and melting points of elements; which stay solid for largest range of temperatures? This incorporates differences between negative numbers. 

1113 
Balancing Equations (Chemistry) 
Ratios 
1213 
Solar System (Physics) 
Loci (all levels) 
1213 
Graphing, sequences from experiments such as measurement of temperature. 

1213 
Liquid soap: how watered down does soap need to be before just slipping of hands/surfaces at various angles. 
Angles of elevation, ratios, rearranging, averages from repeated measurements. 
1314 
Building on the clear links between the Investigation Cycle in science and the Data Handling Cycle in maths by having a joint maths/sci project. 

1314 
Dinosaurs, percentages, ratio, scales and scale drawing; timelines. There could be links to Y7 fossils in science. 

1314 
Pressures, forces & moments, formulae rearranging 

1314 
Chemical Patterns, concentration of solutions, ratio. 

1314 
Reaction Times,Drugs & Behaviour/Quest for Intelligence data handling. Science look at the effects of caffeine on reaction times. In maths could have a data handling project where collecting reactions times provides one set of data to investigate hypotheses comparing boys' and girls' 'abilities' 

1315  Attach data loggers to a pupil and watch as they attempt to create particular distance/time graphs. Pupils are used to seeing the x and y axes as spatial axes, which means the graph creates a picture of what we would see in real life. A distance/time graph is different, but some pupils assume it shows someone climbing a hill, for example.  
1416 
Air Quality/pollutants (GCSE Chem, 21^{st} Century) 
Averages, range, outliers, repetition of trials (probability), reliability of results/comments and comparisons of results (Unit 1 GCSE) 
1416 
Risk (IAS 5 21^{st} Century) 
Percentages, ratio, proportionality, sampling (Unit 2 GCSE) 
1416 
Parallax Error, trigonometry. Linking initial discovery into trigonometrical ratios with this. Also could be developing concept of accuracy and bounds. 

1416 
Standard Form, Astronomical distances / cell biology. 

1416 
Lens formula, focal points / telephoto lens &enlargements. Interesting area, with links to formulae, angles and transformations. 

1416 
Crystal formation, 3D coordinates, angles between bonds, 3D Geometry. 

1416 
Kinematic Equations, rearranging formulae / reallife formulae 

1416 
Samples (Health Studies 21^{st} Century) 
Sampling (Unit 1 GCSE) [NB Sci just random, Ma includes stratified] 
1416 
Electrical Circuits (P5 21^{st} Century) 
Transposition of formulae, straight line graphs (Unit 2 GCSE) 
1416 
Correlation and cause (IAS2 21^{st} Century) 
Lines of best fit, correlation, types of graph (Unit 1 GCSE) 
1416 
Energy and the Environment (all levels Chem) 
Scale drawing, percentages, graph skills, budgeting, area (all levels) 