Pengi

The platform delivers AI‑guided lessons that follow the exact chapters of school textbooks for grades 3‑11, covering math, science, social studies and language arts. Students can move through three modes: “Learn,” which provides a live whiteboard tutor for structured lessons; “Practice,” offering targeted exercises for each skill; and “Challenge,” presenting timed problem sets for competition preparation such as the AMC 8 and AMC 10. Content is organized by textbook chapter, mirroring classroom curricula and supporting over 50 curriculum‑aligned books and more than 500 lessons.

It is aimed at K‑12 learners aged 10‑15 who want to advance, catch up, or train for math contests, as well as parents seeking homework assistance without subject‑matter expertise and teachers looking for supplemental, textbook‑aligned practice tools. The service is free for core content and does not require a credit card.

What sets the system apart is its strict alignment to real textbooks rather than generic chat‑based tutoring, ensuring that each lesson is tied to a specific chapter in the student’s curriculum. This structure also allows seamless integration of standard school material with competition‑level math preparation, a combination that is rarely offered by other educational AI tools.