common misconception is that PBL exists in a separate realm, and that realm is specific to one content area.
Infact, PBL is richly integrative and multidisciplinary.
The usefulness of PBL as a real-world microcosm for students to investigate would provide no further levels of engagement or interest over traditional instruction without the richness of integrating multiple subject areas.
Therefore, when one refers to mathematics PBL or PBL in any other content area, that particular content area is the focus or central theme to which assessment is geared within PBL’s interdisciplinary content.
In addition, regardless of the content focus of the PBL, several important individual student factors essential for increased achievement are addressed.
For example, any PBL learning event either mediates or is mediated by motivation/attitude, expertise, and content