Created by and for educators, Sapling Learning online homework drives student success with one-on-one educator support and time-saving tools.

Client Success Specialists

Chris Knarr, M.S.


Chris got his B.S. in Chemistry from Humboldt State University, where he led two years of undergraduate supplemental instruction courses in Chemistry. He then studied the photophysical properties of coinage metal-pyrazolate complexes with Dr. David Glueck at Dartmouth College, and earned his M.S. in Chemistry. During his graduate program, he was a teaching assistant for two years of undergraduate organic chemistry courses, and mentored undergraduate students in his research lab. After graduate school, he took some time to study baking and pastry arts in Austin, Texas, and was a pastry chef at local restaurants and bakeries. He returned to Chemistry and joined Sapling Learning, where he uses his experience as a student and teaching assistant to help instructors implement Sapling Learning in their Chemistry courses. Chris loves the immediate feedback that Sapling Learning provides, which allows students to identify and correct misconceptions early in the learning process, and build a stronger foundation for subsequent material. In his spare time, Chris enjoys hiking, playing video games, and baking pastries.

Katherine Koen, Ph.D.


Katherine received her B.Sc. in Chemistry with Specialization in Biochemistry with Highest Honors from the University of Virginia, where she tutored other students in chemistry and conducted research in bioanalytical microfluidics with Prof. James Landers. She went on to study super-resolution microscopy techniques at the University of Texas at Austin with Prof. David Vanden Bout, earning  her Ph.D. in Analytical Chemistry in 2015. In addition to studying small things, was fortunate to gain diverse experience teaching undergraduates in general and analytical chemistry and graduate students in optical microscopy and spectroscopy. At Sapling Learning, Katherine puts that experience to work, drawing on office hours and tutoring sessions to identify common student misconceptions and effective ways to support students as they learn. Katherine believes our online homework platform with targeted feedback is an effective tool for teaching students how to problem-solve and lead them to a deep understanding of chemistry. She enjoys consulting with  instructors to make it easy to incorporate Sapling Learning into their courses and accomplish their educational goals.

Nikhil Revankar


Hello. My name is Nikhil Revankar and I'm the Client Success Specialist for Statistics and Mathematics. I have a bachelor’s degree in mathematics and economics from Cornell University and a master’s degree in economics from the University of Virginia. I have previously worked as a teacher and teaching assistant at the high school and higher education levels for a wide range of courses in Mathematics, Statistics, and Economics. If you would like to know more about how I assist instructors with Sapling Intro Stats. 

Caitlin Limonciello, Ph.D


Caitlin studied biology and psychology at the University of Texas at Austin and earned a B.S. with special honors. She then went on to study neuroscience at the University of Texas Health Science Center at Houston where she earned a Ph.D. working in the laboratory of Dr. Anthony Wright. Caitlin’s graduate research focused on visual processing and memory. As a graduate student she served as a teaching assistant for neuroanatomy and cognitive neuroscience courses. Next, Caitlin earned a NIH postdoctoral fellowship and completed postdoctoral research with Dr. Ari Rosenberg at Baylor College of Medicine. She researched visual-vestibular interactions and recovery from vestibular damage. Throughout her postdoctoral work, Caitlin retained an interest in teaching, and she lectured on neuroanatomy, cognitive neuroscience, and vision. At Sapling Learning, Caitlin draws on her teaching experience to help instructors utilize Sapling to augment their students’ learning. She loves how technology can provide a means to demonstrate complex biological concepts to achieve better understanding for students. In Caitlin’s spare time she likes to run, play board games, and spend time with her family.

Andrew Robinson, M.A.


Andrew received his B.S. in Economics from the University of Pittsburgh, where he was a member of the Honors College. Andrew’s interest in health economics was piqued by perusing one of his professor’s papers on the New England Kidney Exchange. Throughout his economic study, Andrew studied mathematics extensively, completing the calculus sequence (which is still his favorite form of mathematics). Andrew went on to study Economics at the graduate level at Temple University in Philadelphia, where he earned an M.A. in 2012. While studying upper level economics, Andrew taught undergraduate economics as a teaching assistant and adjunct. After graduating, Andrew leveraged his teaching expertise while serving as an online economics tutor. At Sapling Learning, Andrew’s teaching and tutoring experience resonates with both students and instructors. He enjoys seeing students have the “Aha moment”, when they understand a topic conceptually. Andrew likes working with instructors to engage their students and encourage lifelong learning. He particularly likes identifying potential solutions to the instructor goals and challenges that come with teaching a broad spectrum of students. His favorite aspect of the Sapling Learning product is the ability to customize the course site to an instructor’s preference. In Andrew’s spare time, he likes to swim and and play videogames, but not simultaneously.