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NFPA 780 is the North American standard for lightning protection systems. It contains “Simplified Risk Assessment” calculations to determine if a lightning protection system is recommended for a specific building.
| Legal access | Details | |--------------|---------| | | Some distributors (e.g., Google Play Books, e-future) may sell a licensed PDF/e-pub. | | Included with teacher account | If you are an instructor registered with Build & Grow, you can access digital PDFs of the Student Book, Workbook, and Teacher’s Manual through their Learning Management System (LMS) . | | Sample pages | The official website offers free PDF samples (first unit + table of contents). |
| Resource | Format | Best for | |----------|--------|----------| | | Scans of old editions sometimes available legally via Oxford Teacher’s Club (free registration) | Very similar level | | Essential Grammar in Use (Cambridge) – Unit 1–30 only | Official sample PDF (first 30 units) – free on Cambridge website | Older beginners (age 10+) | | Super Grammar (Scholastic) – free sample PDF | Publisher sample (8 pages) | Visual learners | | ESL Library (Red River Press) | Free 14-day trial → download PDFs (beginner grammar section) | Teachers who need worksheets | 6. Key grammar points in Grammar Space 1 (with examples) If you cannot access the PDF, you can still learn the same topics from other free sources. Here’s the full syllabus of Grammar Space 1 : grammar space 1 pdf