TABTOR MATH, which offers a math app for students in grade K-8, has raised $3.7 million in a Series A round led by Syven Capital. John Katzman, CEO of The Noodle Companies (and previously of The Princeton Review and 2U) also invested. Based in Kendall Park, NJ, Tabtor Math’s tool requires students to solve problems by scribbling on the tablet with their fingers or a stylus, after which a dedicated tutor reviews the work and offers feedback. Additional features include “Active Replay Technology” that allows parents and instructors to playback students’ penstrokes. Pricing ranges from $30 to $100 per month.