Possible uses

Consider the text to work on can be simultaneously accessed through another medium or form with different tools.

Here is a non-exhaustive list of hints :

The text is the rephrasing of a text already studied or currently under study.

Reuse of lexical framework.

Rebuilding of grammatical framework.

Rebuilding of a narrative chronology of events.

Rephrasing (same text with lexical substitutions)

Rewriting (tense, reported speech, etc)

The text can also be in audio form, the written text being the literal or slightly rephrased transcript of the audio document.

Aural comprehension process based on recognized elements (build)

Small-scale observation and testing (spot)

Eliminating (pick)

Reordering a chronology of events (unjumble lines)

Recognition of aural form items (unjumble words )

Recognizing basic units of written speech (segment)

Recognizing basic units of aural speech (segment)

Punctuation

List-based exercises (phonetic discrimination, ...)

The contents of the text  may appear in audio or video form : a video clip, for example, can show what the text is about, use the same vocabulary items and turns of phrase.

Uses, however open, are not unlimited.

Also consider that exchanging information gathered by different learners is an activity of its own.