Plan is to use a Spaced Repetition System where possible and then hands on activities for reinforcement.
My answer is to teach them english (reading, writing and speaking) and computers. If I can teach them these basic skills they can learn anything by themselves.
We live in Thailand where its very expensive to get a good education in english. So I took my kids out of school and hired a teacher to give a very strong foundation in english. I'm teaching them computers. After a while I'll teach them basic maths and then I'll let them choose what they want to learn themselves.
My goal is to give them a love of learning, to help them find out what they love to do and give them the time and tools to become an expert in that.
2.) Learn to say please and thank you
3.) Watch TV and play video games just in moderation
4.) Treat others with kindness and be respectful especially to elders
5.) Make healthy food choices
6.) The ability to tell the truth
7.) Take public transportation
8.) Know when to say no
9.) Save money and spend wisely
10.) Listen carefully and look someone in the eye during a conversation
11.) Distinguish needs from wants
12.) Cook a meal, do the laundry and household chores
13.) Developing good study habits
14.) Mom and Dad won't always be there to save you when you screw up
Obvious ones include financial, survival, social.