This used to be taught as part of "home economics". What we really need is a massive update to that class, which lives up to its name and covers:
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nutritional food purchasing - how to get food nutrition on a rock-bottom budget
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yes, how to prepare nutritious meals using the most affordable ingredients (how to properly prepare rice, and dry beans), how to follow a recipe, and the fundamentals of cooking: (how to make cheap cuts of meat edible and delicious, Why different cooking methods work in some cases, not in others)
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financial literacy that is up to date, and explains how the entire credit system is a dangerous trap, and how to use it safely. How and why to open credit union (not bank) accounts. How to file taxes for free, and what to actually expect for take-home pay after taxes for various incomes and situations.
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realistic budgeting for success. Kids need to understand that they need to expect shared living situations for most of their adult life.
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actual ROI of college when loans are factored in
... separate from this we also need civics class to that includes some fundamentals that are usually only taught to first year law students: how contracts work, what negligence is, what's The first amendment is and what it isn't. And how to interact with cops to protect yourself.
Civics class should also include technical walkthroughs of how to register to vote, and how to do the actual voting, and how to use absentee ballots.
Civics class should also include lessons on how to find ORIGINAL sources to gather information about which candidates to vote for, and how to choose media and fact checkers by whether those media and fact checkers accurately represent the content of the original sources.
Civics class should also tell students the technical processes of how they can run for office, and what offices are available to them at the local level.