when I started secondary school in 1981 I started in the first year, then I went in to the second year etc, after O levels (remember them?) I went in to lower 6th and then upper 6th for my A levels. I know it's all changed now, secondary starts at year 7 an' all that, but when and why did it happen? Does anyone refer to Y13 (I don't think I've ever heard anyone refer to themselves or anyone else as being in Y13) or are they still upper and lower somethings?