We are nowhere without the Guiding Questions. Look at these, and the Linking Questions, at the start and when trying to weave a narrative through the topics.
Experienced teachers will already know the links they like to draw between topics but you can also be a little more spontaneous. Emma Mitchell, one of the authors of Pearson Physics for the IB Diploma Programme, recommends building up the links as you go along. The Linking Questions are examples, they are there to help you come up with the connections you think you need.
We have some sample unit plans that can be used to teach a topic and as examples for writing your own unit plans.
You can sign up to access the unit plans, plus supporting activities and lab skills worksheets here.