Accelerating mathematics learners : what counts?

This article elaborates on my statements quoted in The Age October 2014 article 'More students take on VCE mathematics subject early'. (http://theage.com.au/victoria/more-students-take-on-vce-subjects-early-20141024-11b4rv.html). This article was about accelerating mathematics students by allowing them to take year 11 Mathematics subjects in year 10, and year 12 Mathematics subjects in year 11. My statements were 'Although 'taking on Year 12 subjects early could help students prepare for the workload once they reach their final year ... based on my research and teaching experience, you don't take on early those subjects that are going to be key to your university studies' because 'going early means you are going to rely much more heavily on learning things faster.