1. Master the Fundamentals:
   Before diving into complex calculus problems, ensure you have a solid grasp of the fundamentals. Review basic concepts such as limits, derivatives, and integrals. Understanding the foundational principles will make it easier to tackle more advanced topics and problem-solving.
2. Effective Time Management:
   Calculus assignments often involve multiple steps and intricate problem-solving. Effective time management is key to completing assignments with accuracy. Break down larger tasks into smaller, manageable sections and allocate specific time slots for each. This approach helps prevent procrastination and ensures a systematic approach to problem-solving.
3. Practice Regularly:
   Like any skill, calculus improves with consistent practice. Dedicate time each day to work on calculus problems, ranging from textbook exercises to additional practice sheets. The more exposure you have to various problem types, the better equipped you'll be to handle assignments with confidence.
4. Utilize Online Resources:
   Take advantage of the abundance of online resources available. Websites, video tutorials, and interactive platforms can provide alternative explanations and additional practice problems. Platforms like Khan Academy, Wolfram Alpha, and Paul's Online Math Notes can serve as valuable supplements to your coursework.
5. Collaborate with Peers:
   Form study groups or seek assistance from classmates. Collaborative learning allows you to gain insights from different perspectives and exchange ideas. Explaining concepts to others can deepen your own understanding, and group discussions often reveal alternative approaches to problem-solving.
6. Seek Clarification:
   Don't hesitate to ask questions in class or seek clarification from your instructor. Understanding the nuances of calculus requires a clear understanding of each concept. If you encounter difficulties, addressing them early will prevent the accumulation of misunderstandings and enhance your overall comprehension.
7. Solve Past Assignments and Exams:
   Familiarize yourself with the format and types of questions that may appear in assignments or exams by solving past papers. This practice not only helps you become comfortable with the exam structure but also reinforces your understanding of key concepts.
8. Use Calculators Wisely:
   While calculators can be helpful, it's crucial not to rely on them entirely. Use calculators as tools to verify your answers or simplify complex computations, but aim to solve problems manually to reinforce your understanding of the underlying concepts.
9. Review and Revise:
   Before submitting your assignment, allocate time for a thorough review. Check for errors, ensure your solutions are presented clearly, and verify that your answers align with the given problem statements. A meticulous review can make the difference between a good score and an outstanding one.
10. Embrace a Growth Mindset:
    Approach calculus with a growth mindset, understanding that mastery is a continuous process. Embrace challenges as opportunities for learning and improvement. Celebrate your successes, learn from mistakes, and persist in your pursuit of calculus excellence.

Conclusion:
Achieving 90+ scores on your calculus assignments requires a combination of dedication, strategic planning, and continuous practice. By mastering the fundamentals, managing your time effectively, leveraging online resources, collaborating with peers, seeking clarification when needed, and adopting a growth mindset, you'll not only excel in your calculus assignments but also develop a strong foundation for future academic and professional pursuits. Remember, excellence in calculus is an attainable goal for those committed to the journey of continuous learning and improvement.