https://youtu.be/3gq8XBs6jQY?si=-Mm4tEZujR_tniFo
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The 90% Rule — Both the American Council on the Teaching of Foreign Languages (ACTFL) and the Teacher Effectiveness for Language Learning (TELL) project agree: students and teachers should use the target language 90% of the time.
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Proficiency is a direct function of time spent practicing the language. This includes listening to all sorts of messages made comprehensible through visuals and gestures. As learners advance, they move through proficiency levels at a progressively slower rate.
https://storage.googleapis.com/hd_teaching/TimeLost/language-time-calculator.html
French & Spanish — Interpersonal Speaking Mode
| Proficiency Level | Hours Needed | What It Means |
|---|---|---|
| 🟢 Novice Mid | ~150 hours | Basic greetings & memorized phrases |
| 🟡 Novice High | ~300 hours | Simple sentences on familiar topics |
| 🟠 Intermediate Low | ~450 hours | Creating with language; asking & answering questions |
| 🔴 Advanced Low | ~1,000 hours | Narrating & describing in paragraphs |
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Notice that each jump requires exponentially more time. Going from Novice Mid to Novice High takes twice as long. Reaching Advanced Low takes nearly 7× longer than Novice Mid.
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Even 5 minutes of class time lost to English each day has a massive cumulative impact on student proficiency.
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Per Week ~30 minutes lost
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Per Month 2 full class periods lost
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Per Year 15 hours lost — nearly a full month of class
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Embed your interactive calculator below to see exactly how much time is lost to English: