| Feature | – most common | McGraw-Hill Ryerson – less common now | | :--- | :--- | :--- | | Physics unit | More formula-based problems | More conceptual explanations | | Chemistry unit | Excellent periodic table activities | Stronger on lab safety protocols | | Biology unit | Clearer cell diagrams | Better photosynthesis step-through | | Availability | Easier to find used (AB schools) | Out of print, harder to find |
The "Earth Science/Climate" Unit