Creativity, Action, and Service
As its name implies, you have to complete Creative, Action, and Service (CAS) activities. CAS seems a lot more important than it ends up being. You need to complete a certain number satisfactory reflections to fulfil this aspect of IB – but it does not contribute to your grade score. These reflections can be pictures or just a short summary of what you have learnt.
It is great that the IB has a required element of doing extra-curriculars, because it means there is the in-built expectation that you focus on doing activities outside of academics – which is hopefully reflected in your timetable. In reality, this means that you have the freedom to do activities you were already doing or would have done anyway.
CAS projects have to incorporate teamwork and last for over 1 month – though this can include preparation. Often, things you are already doing at school can count e.g. putting on a concert, doing an expedition, preparing for a big debate.
CAS is not something to stress about! If possible, do your reflections from the beginning of the IB – maybe 1 a week, taking literally less than 10 minutes.