1) Do one entry in your English Activity Journal - Watch a video or film or DVD in English (with English subtitles, not German!) and write about it in your Schulquart Heft (50+ words)
2) Read the email on pages 20-21.
3) Do exercises 1 and 2 on page 21
4) Re-read the grammar explanation on page 23 (Befehlsform, Present Simple Tense)
5) Do the grammar exercises on page 23.