When words need
a little ink.
A circle around the confusing term. An arrow connecting a thought. A graph that makes the pattern visible.
On a fraction problem, the tutor can draw an editable circle around the denominator, then explain what that particular number means.
A real drawing, not a picture of one
The student and tutor use the same editable objects: paths, shapes, arrows, labels, highlights, and constrained function plots. Tutor actions are validated and saved before they appear. Marks remain attached to the page when you zoom or rotate it.
Keep your own thinking clear
Student work, tutor teaching ink, and grading feedback are separate layers. Hide teaching annotations, select and move a mark, or undo an explanation without replacing the original file. The tutor cannot erase student work.
At a pace you can follow
Validated marks animate in sequence. Pause, speed up, or stop the explanation. A durable action log supports recovery and replay. The student controls whether the page follows the tutor’s focus.