Understanding and retaining concepts can be quite challenging without regular practice and review. Here are some effective ways to review and reinforce the concepts you’ve learned:

1. Practice: The best way to reinforce concepts is through consistent practice. Practice does not necessarily mean rote learning, but applying the concepts in various contexts. For example, if you have learned a new vocabulary word, try to use it in a sentence or incorporate it into your writing.
2. Flashcards: Flashcards can be a great tool for quick review and memorization. Write the concept or term on one side and its definition or explanation on the other. Regularly going through these cards can help reinforce your understanding and recall.
3. Teach Someone Else: Explaining a concept to someone else is a great way to reinforce your understanding. It forces you to simplify and articulate the concept clearly, reinforcing your comprehension and retention.
4. Mind Maps: Mind maps are visual diagrams that represent concepts and ideas, making it easier to understand and recall complex information. You can create a mind map for each concept, illustrating how it is related to other concepts or ideas.
5. Self-Testing: Regular self-testing can help reinforce concepts and enhance long-term retention. This could involve answering practice questions, completing quizzes or doing past papers.
6. Use Real-World Examples: Applying concepts to real-world situations can help reinforce your understanding and make the learning more meaningful. Try to relate what you learn to something in your everyday life.
7. Group Study: Studying in a group can be beneficial in reinforcing concepts. You can learn from others’ perspectives, clarify doubts, and discuss complex concepts.
8. Use Online Resources: There are plenty of online resources available, including educational websites, online courses, and YouTube videos, which can help reinforce the concepts you’ve learned.
9. Maintain a Concept Journal: Write down what you’ve learned after each study session. Reviewing this journal periodically can help reinforce concepts over time.
10. Use Mnemonics: Mnemonics are memory aids that help in recalling complex information. They can be particularly helpful in learning and remembering complex concepts.

Remember, everyone has unique learning preferences, so it’s essential to find the review and reinforcement strategies that work best for you. Regular review and practice, along with a genuine understanding of the concepts, will help you retain information better and apply it effectively during the PSLE English Examination.