Instead of submitting a copy of your teaching certificate with your application, you may submit verification that you are matriculated in a certification program (e.g., letter of acceptance, letter from advisor).
Expository writing is writing that seeks to explain, illuminate or 'expose' (which is where the word 'expository' comes from). This type of writing can include essays, newspaper and magazine articles, instruction manuals, textbooks, encyclopedia articles and other forms of writing, so long as they seek to explain.
An effective expository essay usually begins with an introductory paragraph that gets. readers interested in the topic, includes three (or more) body paragraphs that explain the. topic, and ends with a concluding paragraph that summarizes the topic.