During lesson, no mobile phone is allowed. I, myself, will not use mobile phone unless its a call from my other students or their parents. I expects all homework to be properly done. Parents should assist to make sure that homework are completed on time. There should be no eating or snacking during lesson too as its too hard for students to concentrate. Similarly, no music is allowed too.
For Science and Maths, I would go through the coursebooks/ textbooks with the students to make sure they understands the concepts. This is follow up by assessment books to make sure students have enough practice and attempts a variety of questions.
For English, I rely mostly on assessment books to make sure students practice more other than their school works.