Grammar check Please!

Hi everybody!

Please correct my following passage. This is a compliment letter to my son's principal:

“It was really impressed to see principal that you sat in the school bus twice after school with the kids together. I think you shoukd be checking how smooth the bus route is going so far and guiding its service. Knowning principal is that care and concern every aspects of the school stuff, and putting that much effort, time, passion and love in work, always trying and giving improvement to manage the school well. We definitely be sure that we have picked the right school for our little son.

And at the same time, it was so kind of you that I saw you were holding my 2-year-old son and sat with him in the bus. I know that was because you think he is rather young among the others. Herein, my husband and I just wanted to show how much we are appreaciated about it, and say thank you so much for giving this special care for our son.

It is really our fortune to encounter such a decent, devotive, kind thoughtful and willing to listen to comments' principal. The school was not estsblished for long, but I trust that under your guidance, it should be growing and developing very well in the future. And my son and all the students in the school should be having a happy and cared school life.”

Thank you very much!