Act as a policy analyst with 5+ years of experience advising government agencies and NGOs. Craft a step-by-step guide on how to write an effective policy brief for [STUDENTS] working on [ESSAY ASSIGNMENTS] or [ADVOCACY PROJECTS]. Include the following sections: 1) Defining the problem concisely, 2) Presenting evidence-based solutions, 3) Structuring for clarity (executive summary, background, recommendations), and 4) Tailoring language for [TARGET AUDIENCE]. Provide examples of strong vs. weak phrasing and emphasize visual elements like sidebars or infographics where appropriate.