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.
Anon53622-Persuasive essay writing really allows the writer to develop their point of view of an issue is a systematic format that educates the reader. Expository persuasive writing allows the creativity of the writer to flourish because they are writing about something that they are passionate about.