Meeting Students' Needs through Scaffolding

This two-pager from the engage NY website is an excellent overview of scaffolding strategies.
Meeting Students' Needs through Scaffolding: 

• explains how scaffolding and differentiation are similar and different;
• explains the difference between "front-end" scaffolding and "back-end" scaffolding;
• provides examples of both front-end and back-end scaffolding in the context of helping students read complex text;
• offers examples that can be used across disciplines and grade levels.