For years I struggled with the greater-than/less-than signs because I didn't realize that the limitation of reading it from left-to-right was in effect. I often wondered what would happen if you went from right-to-left, would you have to change it from greater-than to less-than (or vise-versa)? I don't know how, but I was never ever able to convey that question to any teacher well enough for an answer. Nor did they ever explain it so I understood. I was so furious at myself years later when I realized (during a programming class) the simplicity of it.