Translation of rucksack in Spanish

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.
I think that working with you in this case would be just by Skype because it will be 8-20 sentences per month and always spontaneously like today's message which was 'Another five days until the weekend...'
It's very good for me to be a member at Vocabulix be because I meet many new people. I'm currently being trained to be travel consultant and I really need English and Spanish and maybe other languages.