Some students are more fluent, some are shy, some can't speake ,some feel hesituation, there are many kinds of students present in one classroom ,
And to manage them it's difficult but not impossible.
children experience everything they follow you , they noticed you so a teacher should maintain his or herslf. And should b polite when he or she speake he should know about that, that by his words noone feel uncomfortable, he or she should available for students and show as a friend that a students can share his thoughts with his mentor ,his guider,his facilitator,
And try to solve that and should increase his confidence.
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Respect to your children and there thoughts.