I think in the past, Notgrass’ Exploring Economics was recommended. Also, Whatever Happened to Penny Candy, Economics: A Free Market Reader, and some use the Bluestocking Press wrkbk that goes with it. There are some other financial readers in the Uncle Eric series.
Other sources mentioned in the past:
Another source, a challenging one, is Thomas Sowell’s Basic Economics. Questions are on his website. An easier one is Lessons for the Young Economist by Robert P. Murphy. Here’s a PDF:
https://mises.org/sites/default/files/lessons_for_the_young_economist_murphy_0.pdf
Here’s the teacher’s guide
These teach from the Austrian School of Economics; traditional Capitalist, free market system.
If you have a budding Economist, then Adam Smith’s The Wealth of Nations and F.A. Hayek’s The road to Serfdom should be added.
A good series aired on PBS in 1980 called Free to Choose. Famous Austrian Economist Milton Friedman was featured. It’s 10-episodes long.
HTH