It has come to light that some children are having trouble seeing tasks that have been set by their teachers. I have been in contact with the Mathletes at Mathletics and they have suggested this is a problem materialising due to old versions of Mathletics being used. 

There is a new version of the app that you can download (see the picture above for reference).

If you are still having problems, please contact your class teacher via their gmail address.