I am just working on a revision app for science and thought it may be better using some form iads than charging the 69p. Anyone's experience of using iads would be appreciated. Do I need to resize images to accommodate ads space, will it be appropriate ads as it for children, is it a good revenue model, does it look OK on your app or does it effect its image, have you had any negative comments about ads, do you offer ad free paid version etc. Any guidance would be appreciated.

You do not need to resize your images if they are in a Menu List, it will just scroll longer. I do not know about how the revenue of the iAd's are. I believe in iTunes Connect, you can specify the types of adds you would like displayed, but you mist log in to iTunes Connect, create the app and click enable iAd's. Most iAd's are banks, cars, and new products such as other apps. They generally look fine on your apps, and do not generally interfere with the Graphical User Interface (GUI). For more information on iAd's go to: https://developer.apple.com/iad/