AlgaeBase offers a free database of information on algae species around the world. This project is part of the Species 2000 initiative, created to enumerate "all known species of plants, animals, fungi and microbes on...

More than 50 "informal notes" by Kevin Brown on algebra. Kummer's Objection; irreducibility criteria, multiple linear regression, string algebra, characteristic polynomial of a matrix, iterated means, sums of powers,...

This course provides an introductory algebra course. Topics include groups, vector spaces, linear transformations, symmetry groups, bilinear forms, and linear groups. The materials include lecture notes, exams and...

This free algebra textbook from Boundless Learning is based off openly available educational resources such as "government resources, open educational repositories, and other openly licensed websites." The textbook...

Practice solving algebraic equations with this interactive quiz brought to you by Interactivate and the Computational Science Education Reference Desk. The quiz allows you to select the difficulty level, time limit and...