How to learn and research independently. Teach a child that and they can learn for the rest of their lives, even if they don't see the point of algebra at school, they can pick it up later. This weekend, DH forgot about Pythagoras' theorum while buying a ladder. When in the shop with me later exchanging it, I could calculate the height the ladder would reach if the hypotonus was 7.21m, the ground needed to have 1m across for every 4m up... a 7.21m ladder would reach up a minimum of (root of 7 squared minus four squared = root of 45) 6.5m. Checking at home with a calculator it's a bit more, but we needed a 6.5m ladder.

Financial planning is done at schools - but it's just in the lesson, so not applied to real life. Which is why we need to develop life-learning and application skills rather than set subjects the whole time.

eta - and NO, don't teach family planning. Or at least don't teach it to my DH. I really want to birth a child (to paraphrase Archilles the young crocodile). So which expletive taught my expletive husband about expletive condoms? Seriously ready to lash out with severe verbal abuse to that person. DH has had it already for a little while now.