This document appears to be classroom materials from a Philippine high school on the topics of assertion and formulating statements of opinion. It includes definitions and examples of different types of assertions like facts, conventions, opinions, and preferences. It provides instructions for students to analyze short texts and formulate their own assertions. There are also pre-tests and assignments for students to complete, including identifying statements of fact, opinion, and assertion in a short passage. The overall document seems aimed at teaching students how to properly formulate and support their own assertions and opinions on various topics through examples and practice exercises.