Practice the way the AP exam grades.

Work each question out on a canvas, like paper. Sigmund marks every line against the College Board's rubric, so exam day holds no surprises.

Start practicing
Question 2 of 5
Question on Change in Tandem

The graph shows d(t)d(t), the depth of water in a rain barrel, in centimeters, tt minutes after a controller starts. Give the coordinates of the local maximum of dd and interpret them in context.

Sigmund
Sigmund

Connected to your courses.

One simple question from you sets off a whole chain behind the scenes.

Practice history
Your mastery map
Mathematical verification
Code execution
Course & Exam Description
Learning objectives
AP scoring rubrics
Frontier AI engines

The average student with a personal tutor outperforms 98% of the classroom*Be in the top 2%.

That's not a slogan — it's research. 2Sigma gives every student a personal AI tutor that adapts every question exactly to you, built on the College Board's own AP course framework.

*Based on Bloom, B. S. (1984). The 2 Sigma Problem. Educational Researcher, 13(6).

Your first question is one tap away.

Sigmund
SigmundYour personal AP tutor

What AP course do you want to work on?