Basic Skills encompasses Reading, Writing and Math. 
Please visit the sites below for more information on these skills.

"Math Literacy Newsletter" - The Ohio Literacy Resource Center (OLRC) contains useful  resources for Math instruction, such as this OLRC Publication.
Spotlight on Reading/Writing - The Southwest ABLE Resource Center focuses on Reading and Writing. 
   
Evidenced Based Reading Instruction for Adults: An Overview - This is an introductory online course on reading created by the Southwest ABLE Resource Center.