Yes, there are. However, the goal of the training is to improve all their skills, meaning both their oral and writing skills. With beginners in particular, we need to work right from the start on all components, including oral skills, grammar, vocabulary, fluency and pronunciation. With a more advanced member, we can work on one skill in particular, such as writing, speaking or comprehension.
On March 21st, 2017. See this statement in context.