Anyone with an Expii account can write an explanation, practice problem, or solution. Our authors are teachers looking to provide an extra reference, students learning how to articulate their knowledge, and enthusiasts trying to challenge themselves and build a community resource.
Having different voices is what makes Expii strong and lets you find the explanation or question that helps you learn best. To make sure everything is correct, we have a team of content experts who moderate incoming content for accuracy and quality. In addition, you can upvote content that you think is awesome to help make sure that the best rises to the top.