UPchieve is a free online and on-demand tutoring platform for students in grades 8 to 12 who attend Title I schools where large shares of students are experiencing poverty. UPchieve matches students with unpaid volunteer tutors one on one and in an online setting. In this setting, students can take advantage of a chat feature and virtual whiteboard to receive assistance with a topic of their choosing, including tutoring in math, science, English, or history; SAT preparation; and college counseling. UPchieve tutors are available 24 hours a day, seven days a week, so that students can receive support at any time during the day or night. This study aims to provide evidence of the impact of on-demand, online tutoring on student math achievement and perceptions about math using a pilot randomized controlled trial. Specifically, it examines the impact of participating in additional UPchieve math tutoring sessions on 9th- and 10th-grade students' math achievement, motivation, confidence, and engagement. This report is one in a series of six reports on math tutoring programs. The goal of this report series is to inform the tutoring field more broadly and support the provision of high-quality tutoring to as many students in the priority communities as possible. [This report was prepared with UPchieve.]