A Level Maths and Calculus
https://www.youtube.com/user/TheIntegralCALC
http://www.quickanddirtytips.com/education/math/how-to-use-geometry-to-calculate-the-size-of-earth
Only 11% of parents feel well prepared to help their children in the coming academic year http://www.independent.co.uk/student/student-life/Studies/young-people-sacrificing-vital-life-skills-to-cope-with-exam-pressures-gcses-a-levels-a7319191.html
New analysis finds most affordable top 200 university is three times cheaper to study at than in the UK http://www.independent.co.uk/student/study-abroad/germany-sweden-named-cheapest-places-to-attend-university-times-higher-education-world-university-a7320676.html