We think this omission was a product of Ads by Google …
“Learn how to read and write English at-home with Penn Foster”
(the Web site does not seem to sport this error)
(click here to see the real Web site)
As is: “Learn how to read and write English at-home with Penn Foster” (At this time, we have no comment about the misused hyphen in this ad.)
With Comma Clout: “Learn how to read and write English at home, with Penn Foster”