Is one target a week really challenging enough?
Considering that in most cases, learners will be setting this target on top of all the other school work they are doing. One target a week is certainly enough.
In the experience of the last six months we have found that students have made huge demands on themselves and have even submitted more work in the holidays than in school time.
As they become more skilled and if the school devotes more time to skills based learning they can take on new ladders and new skill sets. For example we are working on a skill set that allows children interested in becoming game writers to progress these skills alongside the others.