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Free Online Courses! Visit LongLiveLearning.com for links & info to these sites and more learning resources.

A wonderful list of websites providing free online courses. Click the images to visit the site & find courses right for you! At the start, OpenupEd offered around 40 courses, covering a wide variety of subjects available in 12 Continue reading →

This has most likely been posted here before, but it's incredibly useful.

Post with 15723 votes and 602071 views. Tagged with , , , ; Physics formulæ from The Physics Hypertextbook

Back to Basics: Acids, Bases & the pH Scale. A refresher course on acids, bases, and the pH scale to better understand the meaning behind your pH test strip results. | Precision Laboratories Blog

Back to Basics: Acids, Bases & the pH Scale. A refresher course on acids, bases, and the pH scale to better understand the meaning behind your pH test strip results.