Teaching grammar – or teaching anything for that matter – used to be a question of the teacher just standing up and explaining it, hopefully using the whiteboard to add some rules that the students can copy down. Asking students questions rather than expaining things not only involves the students more, as they have to think and respond, but it also tells the teacher who understands and who doesn’t, and he or she can tailor their teaching accordingly. Eg « Tomorrow I is going to London » (checks form) and « Last week Emma is going to Prague » (checks function) Once your teaching is over, give students a variety of activities to practice the grammar point.