- Tier by challenge level (Bloom's Taxonomy)
- Tier by complexity (Address the needs of students at intorductory levels, as well as students who are ready for more advanced work)
- Tier by resources (Choose materials at various reading levels and complexity of content)
- Tier by outcomes (Students use the same materials, but their end-products vary)
- Tier by process (The end-products are a the some, but the ways in which students arrive at those outcomes may vary)
- Tier by product (Group multiple intelligences or learning styles, followed by assignments that fit those preferences)
from Differentiating Instruction in the Regular Classroom by Diane Heacox