In China, a class in primary and secondary schools is generally 45 minutes, while that in colleges and universities is 50 minutes. Also known as "class hours". Nowadays, college courses are all academic progress in class hours. The class hours of adult education are different according to the characteristics of the industry.
For example, the class hours of physical training are usually 30 minutes, while the class hours of adult vocational education are 90 minutes, with an interval of 15 minutes.
Precautions for kindergarten safety:
1, cultivate children's good living habits and promote the development of self-protection ability.
2. Dressing correctly and orderly can protect your body, and tying your shoelaces can avoid falling and being injured.
3, eat fish, pick the fishbone clean, avoid sore throat, eat without laughing or playing, and avoid foreign bodies entering the trachea.
4. Educate children to prevent burns. You can't pour your own boiling water, stay away from the kettle, and you can't serve your own food.
Pay attention to safety when drinking water, and wash your hands when going to the toilet. Children should be taught how to be humble, queue up, and not push or squeeze. Teachers should look after children and often remind them to pay attention to safety.