Verb conjugation of "klatschen" in German

However, I must point out that all my students are interested in language labs, and CDs. Vocabulix systems appear to provide unique results. We would have to review the situation soon.
I will be creating an additional study with a student (his name is Juan), which may appear in local newspapers in the future (in English). However, this may take a couple of weeks too.
I really would like to invest more time here but until now I was too busy to keep my promises. Maybe I should take a vacation and go back to Scotland and take another language course there.