9 subreddits that can be your best teachers

•  r/Coolguides
• Serves everything in pictures. Picture based reference guides for everything. Can print, download, share also
• r/ExplainLikeIAmFive
• Easiest explanation for any topic. Offers layperson friendly explanation of complex topics. Has over 23M members. Has threads explaining some of the most debated historical events
• r/ChangeMyView
• For those who like to dive deeper into a topic, share perspectives and read about what others have to say. Post an opinion that could be flawed, but need clarity and perspective. 
• r/InternetIsBeautiful
• Repository of best websites and tools. From e-Commerce sites to image editing to DIY sites to music quiz apps. It has a wide range of websites and tools that are shared by its active community of 17M users
• r/EducationalGIFs
• Interesting place to see GIFs enlightening on some complex topics in the most fun way. Offers educational info in quick to digest and engaging format. From chemical processes to how plants work to how machines work...these are engaging GIFs
• r/DataIsBeautiful
• While CoolGuides shows info using images, this subreddit offers data visualization to convey info. From statistics on worldwide screentime to Darwin award recipients per country, this portal showcases data in the most fun way
• r/AskScience
• If you have questions that need science based answers. eg how birds know about V-formation
• r/AskHistorians
• Historical figures, events and society evolution needs factful explanation
• r/LifeProTips
• All trivia which would help great deal. Like why you shouldn't order few things at few places to what to know before buying something etc this is a reservoir of tips and life hacks. With over 23M members it helps a big lot of people.