Writing Feedback / 'injustice ruins the peaceful life' - THE INJUSTICE ESSAY [3]

in things like freedom of speech...

It is not good to use "in things like" , maybe you can try for example, for instance etc.
overall your essay is good. more transition words use would be help.

Essays / Role for teachers in the classroom and computers - about this topic? [5]

Thesis Statement for a persuasive speech (Not using computers in class)

Students should not use computer devices in class because it can distract students themselves and classmates around the device user, the teacher may lose the meaning of giving lectures since students can learn ahead by going through the slide themselves, and using too much computer has negative impacts on health and vision.