It is really difficult to work with pupils for several hours, when instead of a complete unit of work for 2 weeks, you have fragmented work for 4 weeks. From this point of view, it is disadvantageous to do long-term projects with pupils, because it really takes a lot of hours. BUT, on the other hand, if the project is well prepared (including work assignments), the students will enjoy it and their work will be of high quality and elaborate.
From this point of view, it is disadvantageous to do long-term projects with pupils, because it really takes a lot of hours.