Learn English – Mnemonics for learning the days of the week

You need to do the following things:

• Create a strong context for the language you are teaching. Make it meaningful and important for them before you teach it.
• Make sure your students get controlled and also free practice of the target language.
• Build your syllabus around functions, and - as you have already mentioned - skills for independent and future learning. You only have 16 40-minute lessons lessons - don't try and teach a comprehensive grammar syllabus - it's a waste of time in this time frame. Give them 16 functions/situations and the grammar/vocab needed to be able to carry them out/negotiate them.
• Train yourself up with non-intrusive correction techniques - hand signals, gesture, echoing, mouth movements. Never bother to correct stuff if your students aren't going to repeat it.
• Don't tell your students things, ask them questions.
• Make your classroom a rehearsal room for real life.
• Your 11 hours of teaching amount to a puny input. The greatest and most important thing you can do in this time frame is to give your students an enduring enthusiasm for the language and for learning and to make them positive about what they can do, and what they could achieve. It is proven by research that it's virtually impossible to stop a motivated and enthusiastic student from learning language. Make sure this is what they are when you leave. You'll have set them up for life.

[You will of course want to plan your syllabus before you start. However, when you actually meet your students, you'll need to do a fresh needs analysis based on their strengths, weaknesses and learning aims during your fist couple of lessons. You'll then need to adjust your syllabus accordingly].

Good luck!

In conversation, "the past three days" can depend on what time it is that I'm talking to you. If it's in the morning then I would mean the three days before today. If in the evening I might include the current day, since this day it's mostly over.

But it's not likely anyone cares about specifics other than perhaps the police or your boss, in which case if they're not precise, you should ask:

Policeman: Mr. Vladiz, can you account for your whereabouts the past three days?
Vladiz: Do you mean, including today? Or yesterday, the day before, and the day before that?

With websites like Facebook, the actual value is completely up to the programmer, and can be complicated by things like travel and time zone. If it was me, I would use the past N days (possibly including the current day) based on the time zone of your "home town", but another programmer might choose to base it off of GMT instead.