This site contains tons of links to free teacher resources. The home page currently has 6 categories which users can clink on and then go deeper into a specific area. The categories are chatboards which can be by grade, subject and state; classified ads which are free teacher classified ads, classroom projects with hundreds of project ideas, lesson plans, teacher jobs, teacher mailings for teachers to subscribe to for free.
Shmoop, a publisher of digital educational resources, has added pre-algebra to its list of free learning guides. The online Pre-Algebra Learning guides contain hundreds of topics with succinct explanations, diagrams, interactive examples, practice problems, and real-world applications. Pre algebra is Shmoop's first foray beyond its core humanities offerings. At the home page click on the pre algebra tab
Brain Bashers offers visitors a nice selection of word games, logic games, and puzzles. Brain Bashers is updated regularly with many games that change daily and new games added every week.Brain Bashers was developed and is maintained by Kevin Stone. Kevin Stone is a mathematics teacher in England.
"Arcademic Skill Builders are free research-based and standards-aligned educational games! Engage and motivate students with our multiplayer and single-player games."