A common concern students express is "When am I ever going to need to use this?" I thought it might be useful to have some ready-to-go answers for the most-frequently-seen skills
Fractions: Cooking, carpentry
Decimals: money
Percents: shopping
Interest: buying anything with a credit card, car payments, mortgage
Signed Numbers (pos/neg numbers): Bank fees, debt, altitude, temperature
Algebra: Can be used ANYTIME you don't know a number --> I will make a longer post about this specifically, but any problem can be written as algebra if you use a letter for the unknown number. Sometimes, it makes algebra easier to understand if you talk about simpler math problems they know how to do (addition or subtraction) and show how it can actually be written as an algebra problem
Geometry: Moving, any time you need to measure something, home improvement
Anyway, these are some ideas. But if anyone has other examples, please post them here!
"Leben und Leben lassen"