Problem-Based Learning K-12 Case and Unit Catalog 
PBL cases are available for trained teachers only. If you are a registered member you may use your CERTL supplied username and password to access the PBL Case Catalog and online cases at www.certl.org.
If you would like to become a registered member to gain access to the PBL Case Repository, please visit the Program Development section to learn how.
Here are some sample cases you may view online: