I have been teaching since September 1983 and recently requested my revised salary details from Teachers Pensions. My best three years were from 01/02/09 to 31/01/12, but were then dropping off. In order to preserve this period, I have opted (from 1st March 2019), with the intention of opting back in on 1/04/19. I believe that this creates a hypothetical calculation scenario, where my pension would be based on one of three scenarios. My final salary The best three years out of the last 10 The best three years up until the one month break Obviously the third scenario is going to be the best outcome for me, but I'm just wondering if my thought process is correct.