A number of Lutheran Teachers from Lutheran Schools are adapting a number of these PBL Units.
In 2019 Larry Rosenstock won the biggest prize in Education the Wise Prize. He was able to keep or spend the money as he wished and chose to develop a book detailing the very best of High Tech High projects over the last 20 years that the school has been running. You can see a video of him talking about this here:
The book has recently been published and true to his word Larry has made it digital and available for free download:
This book is filled with rich examples of PBL from the very youngest to the oldest of Primary and Secondary students. There are projects that are multi-age and cross-curricular, well worth investing some time to read through and think about what could be possible in your own school.