Translation of aufschlitzen

Grammar exercises give the teachers and the students different ideas. We discussed the need for exercises in my previous email, but unfortunately I did not receive any further feedback since then.
Take your time to answer me, do the vocabulary exercises and measure your progress! Your answers will be kept in the system itself. After that you can look at the statistics. That's pretty cool here.
I see that you want to improve your English. If you understand Spanish, we could talk on ICQ. If you're online, we can chat there. Can you please give me your email and other contact details.