While looking about the app store I came upon a great app called iDoceo. In short it is a mark book and planner but it has many little features that really save time and are very useful. I try not to ever spend much on apps just in case they are not great, but I am glad that I took a gamble on this one (its currently £4.99) as it is worth every penny.
I can now easily keep a record of all my pupils gardes and marks and no more scribbling out or crossing out things when I have made a mistake in the back of my planner. But the feature I most like is the ability to photograph students work and attach it to the relevant grade. I can also type comments on their work and then print this out to feedback to them.
The link to the app in the UK itunes store: https://itunes.apple.com/gb/app/idoceo-teachers-assistant./id477120941?mt=8