For an 8th grader seeking to practice questions, the following materials are highly recommended:

1. Workbooks: Comprehensive workbooks tailored to 8th-grade curriculum cover a wide range of subjects and provide structured practice questions.

2. Online Platforms: Websites and apps offering interactive practice questions and immediate feedback are beneficial for personalized learning.

3. Flashcards: Flashcards are excellent for memorization and quick revision of key concepts.

4. Textbooks: Using the textbook as a reference for practice questions ensures a solid understanding of the curriculum.

These materials are effective because they cater to different learning styles and provide a well-rounded approach to mastering 8th-grade material. According to a study by the National Center for Education Statistics (NCES), students who engage in regular practice with a variety of materials tend to perform better on standardized tests and have a deeper understanding of the subject matter. Workbooks, in particular, have been shown to enhance critical thinking skills and problem-solving abilities, as they often include a mix of question types and difficulty levels. Online platforms offer the advantage of adaptability and immediate feedback, which can help students identify and address their weaknesses promptly. Flashcards are a time-tested method for memorization, and textbooks provide a solid foundation for understanding the concepts before tackling practice questions.