DOCUMENT: Sole Source

http://www.bie.org/object/document/sole_source_letter

This letter confirms that BIE is the sole source vendor for the following publications: PBL Starter Kit (ISBN# 978-0-9740343-2-4); PBL in the Elementary Grades (ISBN# 978-0-9740343-1-7); PBL 101 Workbook (ISBN# 978-0-9740343-5-5); PBL for 21st Century Success (ISBN# 978-0-9740343-6-2).