Introduction � 1rn1.1 Why Write a Book on Computer-Based Scaffolding inrnSTEM Education? � 1rn1.2 What This Book Covers rnProblem-Centered Instructional Approaches and STEM � 4rn1.4 Role of Scaffolding � 5rn1.5 Central Premises Behind This Book � 6rn1.6 Structure of the Book � 8rnReferences � 10rn2 Instructional Scaffolding: Foundations and Evolving Definition � 17rn2.1 Historical Definition �17rn2.2 Scaffolding Elements � 19rn2.2.1 Dynamic Assessment �ding Just the Right Amount of Support � 21rn2.2.3 Intersubjectivity � 23rn2.3 Scaffolding Forms � 24rn2.3.1 One-to-One Scaffolding� 24rn2.3.2 Peer Scaffolding � 25rn2.3.3 Computer-Based Scaffolding � 26