hello! i think that surrogate motherhood is an solution of actually problem for many families who can’t have children and to continue their family by themselves, because of many factors, like ecological or genetically. Always in different ages people have a problem like infertility, unfortunately, infertility is an extremely common condition affecting one out of seven people, which leads to many different complexes. Today the method of Surrogate motherhood developed in a great medicine progress and performed by the highest technology level. It is an opportunity for many people to have a child. Also it is very popular in many countries, for example, in Kharkov, by this way, were born over 400 childhoods only during 10 years! Probably one of the biggest benefits of surrogacy is that it can enable them to produce their own biological child with their genetic similarity, by using of parent’s own egg and sperm and thereby carry on their bloodline.

so, i don't think, it is unethical, because it helps a lot of families be happy!

I think, that class size influence on the performance of students, because there are a lot of situation when students are not participating at study or class work, because of a lot of students. Also, because of a big class size, when student is ready for classwork, but doesn't have an opportunity to participate because of class is large. So, the increased number of students can negatively effect on subject learning, because many students have questions about the lecture, and teacher can not physically answer all the questions asked. Moreover, it is difficult to observe and monitor large class during the examination, this gives students an opportunity for cheating and plagiarism during a quiz!