Мне не нравится российская система

Мне не нравится российская система образования. Школьники проводят в школе около 5-6 часов (с 8 утра до 13), у нас много ненужных уроков, вместо которых можно было бы заняться чем-то полезным, подготовкой к экзаменам, например~

Результаты (английский) 1:

I don't like the Russian system of education. Students spend in school about 5-6 hours (8 am to 13), we have a lot of unnecessary lessons, instead of doing something useful, preparing for exams, for example ~

Результаты (английский) 2:

I do not like the Russian education system. Students spend in school about 5-6 hours (from 8 am to 13), we have learned a lot of unnecessary, instead of which would be to do something useful, preparing for exams, such as ~

Результаты (английский) 3:

I do not like the Russian education system. Students will then be escorted to school approximately 5-6 hours (from 8 a.m. to 13), we have many unnecessary lessons, instead of which it would be possible to deal with than the useful, the preparation for the exam,For example~ jack