Vocabulary is simply the ability to know the meaning of words and use those words in context. Students learn vocabulary in a number of different arenas. For example, if students are:
Taking a math course, they need to learn math vocabulary associated with the area of study, such as "isosceles" or "equilateral" when learning geometry.
Learning a foreign language, they need to learn the vocabulary from the ground up, starting with basic words and moving into more advanced vocabulary and sentence structure.
Within an English class, English speaking students need to expand their grasp of their native language by learning new vocabulary.
Because of the widespread importance of learning vocabulary, it is a good idea for every teacher to know how to effective strategies for teaching vocabulary to students.