Maryano, this is still a very wide brief!
If it is to teach English to beginners or intermediates:
1) Use visuals - photos/videos/diagrams/real objects/charts/graphs etc. Explain how to use pictures to teach English. Send me a pm if you want a great picture with questions about it, based on Bloom �s taxonomy.
2) Use COMPARISONS - compare two pictures. It is/it isn �t, it �s got/it hasn �t got. In the past, but now... etc.
3) Provide writing frames - show some examples. Provide time connectives: First, then, after that ...etc
4) Prepare SCAFFOLDED materials - match up/gap fill/true or false/sequencing/ jumbled up words/sentences etc
Also, you should search activities/strategies on here.