A teaspoon is smaller than a tablespoon such that 3 teaspoons equal 1 tablespoon (3 tsp = 1Tbsp).
The teaspoon was introduced in London in 1686 as the perfect-sized spoon to measure any amount of tea.
The tablespoon originated in about 1760 as the ideal spoon for use as a serving spoon. The word literally comes from “spoon for table service”.
The thing to watch out for when trying to discern if you want to use a tablespoon over a teaspoon is a big “B” or a little “b” in the middle of the abbreviation.
You could end up with a very cinnamony banana bread if you mistake a teaspoon in a recipe for a tablespoon. Just remember teaspoon abbreviation is a lover case “t” or a tsp sans b.