1. Online resources: There are numerous free online resources that can help students learn chemistry. Websites like Khan Academy, Coursera, and edX offer free courses and video lectures on various chemistry topics. Additionally, websites like LibreTexts and OpenStax provide free online textbooks covering general chemistry and other related subjects.2. YouTube channels: Many educators and organizations have YouTube channels dedicated to teaching chemistry. Some popular channels include Crash Course Chemistry, Professor Dave Explains, and The Organic Chemistry Tutor.3. Mobile apps: There are several mobile apps available for learning chemistry, such as Chemistry by Design, ChemDoodle, and Elemental. These apps can help students visualize chemical structures, learn about the periodic table, and practice solving chemistry problems.4. Podcasts: Listening to podcasts can be a great way to learn chemistry on the go. Some popular chemistry podcasts include The Chemistry Podcast, The Collapsed Wavefunction, and The Skeptics' Guide to the Universe.5. Study groups: Forming a study group with classmates can be an effective way to learn chemistry. Students can work together to solve problems, discuss concepts, and quiz each other on the material.6. Tutoring: If possible, students can seek out tutoring from a knowledgeable peer, graduate student, or professional tutor. Many universities and colleges offer free tutoring services for students.7. Online forums and discussion boards: Websites like Reddit, Stack Exchange, and Quora have active communities where students can ask questions and receive answers from experts and fellow learners.8. Educational games: There are several chemistry-themed games available online or as mobile apps that can help students learn and practice chemistry concepts in a fun and engaging way. Examples include ChemCaper, Chemikul, and Elemental.9. Research articles and scientific journals: Reading research articles and scientific journals can help students gain a deeper understanding of chemistry concepts and stay up-to-date with the latest discoveries in the field. Many universities and institutions provide free access to scientific journals for their students.10. Attend workshops and seminars: Many universities, colleges, and organizations host workshops and seminars on various chemistry topics. Attending these events can help students gain a deeper understanding of the subject and network with professionals in the field.