Any Foundations C Student Workbook may be used with any Foundations C Teacher's Manual. The edition change does not affect compatibility or content; it only changes the location of the readers.
Edition History: Foundations C Student Workbook
Edition 1: Published in 2013. 296 pages. Includes the Foundations C Readers as tear-outs at the back.
Edition 2: Published in 2016. 246 pages. Workbook activity pages are unchanged, but Foundations C Readers are now sold separately as a set of individually bound paperback books, rather than printed in the back of the workbooks as tear-outs.