7. let the students complete the practice then students at work. Out presentations 1-2 people, and a shared validation, then the debate about working together to correct quickly.
7. Have students practice drills. Then students who are working correctly. The present 1-2 people together and check for accuracy. Then discuss about the work to be fast.
7. Let students do the exercises. Then the students work right out the presentation 1-2 people and sharing authentication. And discussion about work correctly, quickly.