Can I use knowledge gained in a classroom in my Dossier?

Yes, Section 1 of the PDD Requirements and Guidelines document states: 

As you investigate this area over time (weeks, months, semester, or a year),

● Keep records of any reading, workshops, coursework, professional development, classroom observations, or other ways you sought information.

● Keep a running record of what you have learned and insights you have gained as you gathered information.