Comics actually a big part in my reading process as I remember certain titles from just before I could really read them, just understanding words here and there and often just looking at the pictures, but still getting the basic narrative flow. Symbolic covers caused a lot of misunderstandings though. The mid 70s had A LOT of covers where Superman and Clark Kent both appeared together and this made me think they were two different people for a long time, which is proof I guess that the disguise works.
But the actual reading books we had at school when I started in 1975 were called Kathy and Mark. I know other schools had Janet and John or something. Was my school, St Barts in Coatbridge, unique in using Kathy and Mark? I always liked them because the kid was called Mark. I also like the fact their dog was called Socks and WANTED a dog called Socks, but my childhood dog already named by that point.