Set up five columns. If you're doing this by hand for a draft, use a ruler and a pencil. It is more advisable to type your plan using programs such as Microsoft Word or Microsoft Excel. This will save you time in the long run.
Label your headers for each column. Starting from left to right, they'll be labeled "Transdisciplinary Theme," "Central Idea," "Inquiry Into," "Summative" and "Notes."
Add rows for each unit, then fill the rows in according to the column header. Like writing goals and objectives, you'll be starting with a big picture and narrowing down the plan. The "transdisciplinary theme" is literally your theme as to how it applies outside of the classroom. The "central idea" narrows your theme and specifies what you'll be focusing on within that large theme. Your "inquiry into" section utilizes a bullet-point format to write the questions or points that you'll be investigating in this unit. "Summative" is written in a full sentence and declares or summarizes how the students will achieve what their inquiring about. "Notes" allows you to specify any tasks or trips that may be associated with the unit.