There are several websites and platforms that offer model answers, essay writing tips, and answer evaluation specifically for Political Science and International Relations (PSIR) questions. These resources can be extremely helpful in preparing for exams, improving writing skills, and understanding the key concepts in PSIR. Here are some recommended websites and platforms:

1. EduRev (www.edurev.in): EduRev is an excellent platform that provides a wide range of study materials, including model answers and essay writing tips for PSIR questions. It offers a comprehensive collection of past question papers, sample answers, and expert guidance on answer evaluation.

2. Study IQ (www.studyiq.com): Study IQ is a popular online learning platform that offers high-quality educational content for various competitive exams, including UPSC. They have a dedicated section for PSIR, where you can find model answers, essay writing tips, and video lectures by experienced faculty.

3. ClearIAS (www.clearias.com): ClearIAS is a well-known website that provides free study materials and guidance for UPSC preparations. They offer model answers and essay writing strategies specifically tailored for PSIR questions. The website also provides answer evaluation services, where you can submit your answers for expert feedback.

4. IASbaba (www.iasbaba.com): IASbaba is a comprehensive online platform that offers guidance and study materials for UPSC exams. They have a dedicated section for PSIR, which includes model answers, essay writing tips, and daily answer writing practices for PSIR questions.

5. ForumIAS (www.forumias.com): ForumIAS is a popular online community for UPSC aspirants. They have a section called "Mains Marathon," where you can find daily answer writing practices for PSIR questions. The platform also offers model answers and guidance for PSIR essay writing.

These websites and platforms provide valuable resources and guidance for PSIR preparations. They offer model answers, essay writing tips, and answer evaluation services, which can greatly enhance your understanding and performance in PSIR exams. Utilizing these resources effectively can help you improve your writing skills, learn key concepts, and boost your chances of success in UPSC exams.