It depends on the trade school and the specific program you are interested in. Some trade schools may require a high school diploma or equivalent (such as a GED), while others may not have any formal education requirements. It's best to check with the trade school you're interested in to determine their specific admission requirements.
In general, trade schools offer training and education in specific vocations, such as plumbing, electrician, HVAC, and auto mechanics. Trade school programs typically last anywhere from several months to two years, and can provide hands-on training and experience that can lead to a rewarding career in a specific trade.