I’m currently doing an undergrad degree in chemistry, which I’m very much enjoying, but (in my opinion) all GCSE and A level qualifications suck in their own special ways and could do with some updating. I could write a book for each subject, so I’ll focus on chemistry here.
As enjoyable as chemistry can be (especially with all the practicals), both the GCSE and A level syllabi are less than brilliant. I personally feel that too much theory is introduced too early on and with far too little context. This leads to oversimplifications and outright lies being taught as fact, which in my view is utterly unacceptable.
Chemistry should really be introduced at GCSE as exciting and relevant, without overdoing the theory. I’d like to see more links to how it is useful in daily life and how one should safely handle chemicals, After all, chemistry is often (wrongly) dismissed as too deeply theoretical to be of any actual use and there are plenty of horror stories about people mixing household chemicals they shouldn’t or unintentionally harming themselves with household chemicals from careless handling.
At A level, I feel it is more appropriate to introduce more of the theory. To an extent, the current qualifications deliver on that, but certain things are given too little in the way of context and this causes confusion. For example, what the hell is the statement “d orbitals in a transition metal element split in energy” meant to mean to a student who has not done crystal field theory (a topic beyond the A level syllabus)? This renders much of the subject to just accepting stuff as fact without even attempting to actually understand it, which is surely antithetical to what it means to be a scientist.
A number of outright lies are also taught as fact. One example (at A level) is which halogenoalkanes are able to undergo nucleophilic substitution. Most exam boards say 1° and 2° halogenoalkanes are the only substrates that can undergo nucleophilic substitution and that 3° halogenoalkanes and aryl halides cannot. The SN1 and SNAr mechanisms for nucleophilic substitution are perfectly well documented in addition to the SN2 mechanism that is shown at A level.