| Feature | PDF Version | Physical Book | | :--- | :--- | :--- | | | 1,000 books on a tablet | Heavy in a backpack | | Navigation | Ctrl+F (Find any word instantly) | Flip pages (Tactile retention) | | Cost | Low (or free with code) | High (Shipping/Printing) | | Eye Strain | High (Requires blue light filter) | Low (Natural paper) | | Longevity | Requires battery/device | Lasts for years |
New Frontiers | Level 6 Student Book with Student Digital Materials CD Student Book New Frontiers 6 Pdf