WAGmob (SimpleNeasy) Books
Kindle (all platforms)
https://www.amazon.com/s?ie=UTF8&page=1&rh=n%3A133140011%2Cp_27%3AWAGmob
iPhone iPad
https://itunes.apple.com/us/book/algebra‐i/id586195994?mt=11&ign‐mpt=uo%3D4
Android
https://play.google.com/store/apps/developer?id=WAGmob+(Simple+%27n+Easy)&hl=en
Academic University by WAGmob
by WAGmob (Simple 'n Easy)
https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Ddigital-text&fieldkeywords=simpleNeasyBook&rh=n%3A133140011%2Ck%3AsimpleNeasyBook
Books which can help (low cost)
Algebra I
Geometry
Geometry Glossary: https://www.nku.edu/~andersonja/dgtw_glos2.pdf
https://www.ptechnyc.org/site/handlers/filedownload.ashx?moduleinstanceid=180&dataid=163&FileName=GE
OMETRYglossarySED.pdf
English Grammar
There are many other subjects available from this source. Mainly beginner level books, but a start for understanding.