I was wondering what type of burettes you provide for your practical chemistry classes - class A or class B? I am thinking of using class A for A level classes and type B for all other requirements - I'd be really glad of your advice. Many thanks in advance.
Class B for all years. As long as the students use the same burette for all the runs of a titration any inaccuracy in the burette will result in a systematic error rather than a lack of precision. The difference between class A and class B is negligible in any event.
Maybe have one set of class A for your own use, class B should do for everything else - if your students are like ours, the uncertainties in weighing etc will be much bigger than uncertainties in class B glassware.