The hardest problem I've met in my work

There is something difficult in my work.Because I'm a kindergarten teacher,there are many children in the kindergarten(maybe you can say "around me").They are very lovely,but sometimes they're troublesome.

When they came in the kindergarten in the beginning,they left their most dependable person.So they cried loudly.I had to coax them.To make matters worse,they cried more loudly and said "Where's my mother?I want my mother.Could you call my mother ,teacher?"I answered:"Your mother is going to work.She will take you away(pick you up) as soon as it is afternoon."At that moment,they stopped crying.(why don`t you describe how they change when they uesd to the life in the kindergarten?Because you use past tense in this paragraph. )

(you`d better start another paragraph.)On the other hand ,I‘m the closest person to them. Parents can't understand it is the hardest problem.Most of parents think their children are the best.In fact,children are overprotected at home.It makes their children are very naughty and selfish.They hit others for getting a toy and can't sit down in the class.I must criticize them.After all,I'm concerned about them.I hope they will become friendly and helpful.
To be frank,this job is very hard,we must help them to have dinner and put on their clothes.

After work,I feel so tired.Therefore,I need more understanding.

(Very good composition. It describes the true thoughts in your mind and is expressed correctly and clearly.✿✿✿✿✿)

BTW:Take a rest when you are exhausted~:)