Final answer:
It is false that it's best to only use a single dictionary source for definitions when teaching new vocabulary, as multiple sources offer a richer, more nuanced understanding of words, particularly in specific contexts.
Step-by-step explanation:
When teaching new vocabulary directly, it is false that it's best to use definitions only from a single source, such as the official 'school approved' dictionary. While a school-approved dictionary can provide a standard definition, it is important to recognize that dictionary definitions often do not encapsulate the full range of a word's meaning, especially in specific contexts or disciplines. Additional sources can offer a more nuanced understanding. For instance, scientific terms like 'theory' have different connotations in scientific contexts compared to everyday usage. It is crucial for students to clearly recognize which words and ideas belong to them and which come from other sources. Moreover, using quotations and other teaching methods, such as having students generate examples, can lead to engaging discussions and deeper understanding of vocabulary.