How are modern day swimming pools made?

Pools that are lined with vinyl are built with metal or plastic frames above ground or set into the excavated hole. Prefab supporting walls or panels made of plastic, steel, or aluminum are joined to the frame, making a form that is then lined with heavy vinyl to form the pool shell.

Explanation:

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 Shay's rebellion was important to highlight the problems with the Articles of Confederation because it showed the people and government how terrible the Articles couldn't handle a crisis. 

 Many of the poorer people had to take large loans to keep their farms functioning while they were off fighting in the revolution. When the war ended, they had no money to pay the creditors back, who began pressing for the money. 

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