Class terms 2

These are sentences I use very often when I am teaching a Chinese lesson. Kindly please correct .

- Can we postpone the class to next Monday? This is fine.  You could say "until" instead of "to".
- Sorry I can't make the lesson on Friday, I have other plans. This is 2 sentences.  You need a period, not a comma.
- I've fixed my group lesson schedule of for this semester . I will be available for private tutoring on Mondays, 10am-11am, and on Wednesdays, 1pm-2pm. Please let me know your preferred time slot.
- Either Monday or Tuesday works for me. ( I want to tell that I can work either on Monday or Tue.) This is correct.

Secondly, travelling influences the ability to accept the new information. The increased culture exchange makes the minds of the modern generation more open to the new information. The continuous mental exercise with new, bright interesting facts makes young brains more and more extrovert. Therefore it affects all the skills that are connected with long-time term concentration and analysis, such as the mathematical study process.

For the third Thirdly, travelling also stimulates the integration between cultures and international studies. The availability of movement travel stimulates and influences one's life plans and personal behavior. to and back travelling for studies and movement and influences the plans for the life and all the line of the person´s behavour. For example, in many countries it has become usual (or normal) to travel for one year between grade school (or high school) and college (or university) in order to gain experience. becomes usual with 1 year between the school and the university for travelling and gathering the experience.
In conclusion, travelling influences the modern pupils. The specific way of travelling in the society where the education process takes place, as well as the long school trips, must be considered while planning the educational process.  I don't understand this last sentence.  I would probably say, "Travelling to different countries and learning about different languages and cultures should be considered an important part of a student's education."

TRAVELLING: FROM THE POINT OF VIEW OF THE FUTURE SCHOOL TEACHER

While the technical progress is going on [or "While technology progresses"] and transport improves, travelling becomes more and more available. For 1-2 thousands of years ago travel took has taken place usually out of some sort of strong necessity. Now it becomes has become a popular way of to use one's free time and a part of  everyday life., and it influences the It also has an influence on school children.
First of all, travelling reflects the requires language skills. The nececarity necessity to communicate results in the increasing knowledge of languages and, in particular, the spreading of English. For 50 Fifty years ago it was difficult to find an English-speaking person in the continental Europe. Now the most of the young people there are able to communicate in English. However, Previously, if there spoke a mixed group from Norway, Sweden and Denmark spoke to each other, each in their own language, they were able to understand each other. that time they spoke each his own language and understood each other. However, now they would speak English and have problems in using other their Scandinavian languages. With the international English instead for the local languages, travelling opens the international science but buries some local traditions.  Using English as an international lingua franca makes international travel more convenient, but hinders learning about local traditions.

"I'll go now" doesn't sound quite right. You could say, "I'm (getting) hungry. I'm going to take off. I'll talk to you later." That sounds a little more natural and casual.

To me it's just a matter of how snobby you want to sound when telling someone not to eat something. Both, "That's something you should not eat," and "That's something you should not be eating," sound pretty condescending to me. I also think that most people wouldn't say it like that. I would just say, "You shouldn't eat that." I don't think that sounds condescending and it's a lot easier to say.

I wouldn't use "brought" here, and I don't know anyone who would. I would say, "My manager put out his hand to shake mine." That is the most natural way to say it. Also, "My manager extended his hand to shake mine."