question: take the user back to instructional material that was not mastered (remediation).
Capitalize this past sentence correctly.
A: Take the user back to instructional material that was not mastered (remediation).

question: on 22. september 2009
Capitalize this past sentence correctly.
A: On 22. September 2009

question: in a previous article i had ever imagined (here).
Capitalize this past sentence correctly.
A: In a previous article I had ever imagined (here).