This skill is one that teachers have reported as being their most developed coaching skill. There are however ways for you to further develop this vital skill. One particular direction that usually needs consideration is how to share the design process with the students.
Part of the ICF description of this skill reads "The ability to create, together with the students, opportunities for ongoing learning, during coaching and in other life situations, and for taking new actions that will most effectively lead to agreed-upon coaching results"
One way of generating ideas for actions is to brainstorm. And in this case it is the student or students who are expected to generate the ideas. As coach you need only set up the activity and later assist in filtering the ideas for those actions that will most likely enable the student to "demonstrate, practice and deepen their new learning".
You could us questions such as, "How will you discover what is needed for this part of the syllabus?", "How can you increase your chances at getting this work done in time", "In what ways could you practice this kind of equation?". These questions encourage the students to start their process of brainstorming. If this is the first time that you have brainstormed there may be an expectation that the teacher provide the answers as well as the questions. That is the teacher's role. It is not the coach's role. As coach, you don't need to provide any answers.