1.Excelmadeeasy.com
You want to learn about Excel simply and quickly. Excel Made Easy is the place. This is a tutorial explaining how to use Excel. It will teach you from the Basics to Advanced in Excel including VBA (Visual Basic), functions & formulas (time, conditional, mathematics, financial, ...), sorting data, analysing data, making templates. It gives you hunderts of free templates. It includes tutorials, templates and our 1000 examples. It will help you understand the differences between Excel 2007, 2010, 2013 and 2016. This site is also a great tutorial for Office Excel for Android. Most of the templates will be Android compatible version.