Initial Rapid Phase (1-2 months): Basic vocabulary and sentence patterns grow quickly, simple conversation ability forms Plateau Challenge Phase (3-5 months): Progress appears to slow, complex grammar and expressions become more challenging Deep Development Phase (6+ months): Cultural understanding deepens, fluency improves, expression becomes more natural Key Success Factors: Language exposure time (total in-class and out-of-class hours) Active usage frequency (number of conversation attempts) Error correction timeliness (feedback loop efficiency) Cultural understanding depth (contextual comprehension ability
