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Your Instructors

Geoffrey Challen is the primary creator and maintainer of learncs.online.

He authored the lesson content and homework problems, and created and maintains the backend systems that power the playgrounds, explanations, problems, and other interactive content. You can find more details about the course infrastructure and more complete credits here.

However, in the years since the original materials were created, other students and faculty from the University of Illinois have contributed to the learncs.online materials. All contributors are listed below.

If you'd like to contribute, please get in touch!

Professor

Geoffrey Challen
Java
Kotlin
802 contributions
Colleen Lewis
Java
Kotlin
325 contributions

Teacher

Carlos Inigo Fernandez
Java
41 contributions
Miguel Fernandez
Java
Kotlin
30 contributions
Jackie Chan
Java
Kotlin
28 contributions

Tutor

Thomas Cai
Java
Kotlin
25 contributions
Rachanon Petchoo
Java
22 contributions
Arnav Sethi
Java
21 contributions
Carl Edwards
Java
21 contributions
Benjamin Chang
Kotlin
19 contributions
Jacob Chang
Java
Kotlin
19 contributions
Haosen Yao
Java
19 contributions
Rohan Gudipaty
Java
16 contributions
Hyunho Kim
Java
Kotlin
16 contributions

Assistant

Sam Erens
Java
Kotlin
15 contributions
Ruisong Li
Java
Kotlin
14 contributions
Tom Sui
Java
13 contributions
Alistair Forsyth
Kotlin
13 contributions
Yuxuan Chen
Java
12 contributions
Carolyn Zeng
Java
Kotlin
12 contributions
Kaan Yigit
Java
12 contributions
Boyang Sun
Java
11 contributions
Matt Twyman
Java
11 contributions
Hrishikesh Kalyanaraman
Java
10 contributions
Collin Fox
Java
10 contributions
Zijing Wei
Java
Kotlin
10 contributions
Zuhair Ali
Java
Kotlin
10 contributions
Sriya Mikkilineni
Java
9 contributions
Ben Clarage
Java
Kotlin
9 contributions
Prith Balaji
Java
9 contributions
Cristian Flores
Java
8 contributions
Arghya Srivastav
Java
8 contributions
Anushree Tibrewal
Java
8 contributions
Nathaniel Zukowski
Java
8 contributions
Brendan Biernacki
Java
8 contributions
Maaheen Maajed
Java
Kotlin
7 contributions
Lexi Ippolito
Java
7 contributions
Niharika Bhattacharjee
Java
7 contributions
Adelia Solarman
Java
7 contributions
Alex Gong
Java
7 contributions
Meera Jagannathan
Java
7 contributions
Amirthavarshini Sureshbabu
Java
7 contributions
Justin Kim
Java
Kotlin
7 contributions
Rohan Shah
Kotlin
7 contributions
Anirudh Kumar
Java
6 contributions
Grace Jia
Java
Kotlin
6 contributions
Diego Taveras
Kotlin
6 contributions
Ishika Awachat
Java
6 contributions
Zhuoang Tao
Java
Kotlin
6 contributions
Ahmed Hasan
Java
Kotlin
6 contributions
Prem Dhoot
Java
6 contributions
Eugene Jang
Java
6 contributions
Anakin Dey
Java
6 contributions
Saagar Kolachina
Java
Kotlin
6 contributions
Nancy Jia
Java
Kotlin
6 contributions
Anagha Shenoy
Kotlin
6 contributions

Helper

Jonathan You
Java
5 contributions
Delu Zhao
Java
5 contributions
Monica Para
Java
Kotlin
5 contributions
Amaan Mirza
Java
5 contributions
Mike Cheng
Kotlin
5 contributions
Harsh Deep
Java
5 contributions
Arjun Prabhu
Java
5 contributions
Zhilan Wang
Java
5 contributions
Sarah O'Sullivan
Java
5 contributions
Aashi Tyagi
Java
5 contributions
Jongwoo Jeon
Java
4 contributions
Anuprova Bhowmik
Java
Kotlin
4 contributions
Stefan Ramli
Java
4 contributions
Matt Yang
Java
4 contributions
Youngmin Jeon
Java
4 contributions
Akul Gupta
Java
4 contributions
Leo Li
Java
4 contributions
Freddy Platinus
Java
4 contributions
Gargi Balasubramaniam
Java
4 contributions
Saurav Chittal
Java
4 contributions
Hania Dziurdzik
Java
Kotlin
4 contributions
Samuel Schapiro
Java
4 contributions
Charlie Rivera
Java
4 contributions
Arnav Motwani
Kotlin
4 contributions
Ashley Wang
Java
4 contributions
Daniyal Rana
Java
4 contributions
Leena Abdelrahman
Java
4 contributions
Rahul Kalle
Java
4 contributions
Rylan Turner
Java
4 contributions
Larry Liao
Java
4 contributions
Zetai Liu
Java
4 contributions
Aditya Joshi
Java
4 contributions
Prerana Singh
Java
4 contributions
Raul Higareda
Java
4 contributions
Reed Huang
Java
3 contributions
Milosz Dabrowski
Java
3 contributions
James Rockey
Java
3 contributions
Ojas Upalekar
Java
3 contributions
Bernie Zhu
Java
3 contributions
Jane Liu
Java
3 contributions
Rachel Huang
Java
3 contributions
Ayaan Jabbar
Kotlin
3 contributions
Neel Khare
Java
3 contributions
Violetta Dabros
Java
3 contributions
Palak Purwar
Java
3 contributions
Samarth Taneja
Java
3 contributions
Serena Trika
Java
3 contributions
Yuhua Weng
Java
3 contributions
Apramey Hosahalli
Java
3 contributions
Anish Meka
Java
3 contributions
Aarav Mande
Java
3 contributions
Idrees Mohammed
Java
Kotlin
3 contributions
Daniel Rugutt
Java
3 contributions
Eduardo Martinez
Java
3 contributions
Lina Mei
Kotlin
3 contributions
Serlina Ku
Java
3 contributions
Sana Madhavan
Java
3 contributions
Alyssa Daniels
Java
3 contributions
Preston Chao
Java
3 contributions
Warren Li
Java
3 contributions
Ananya Subramanian
Java
3 contributions
Ruozhen Yang
Java
3 contributions
Kushal Agarwal
Java
3 contributions
Zhaoyang Chen
Kotlin
3 contributions
Yu He
Java
3 contributions
David Ruvinskiy
Kotlin
3 contributions
Aditi Khanna
Java
3 contributions
Archna Sobti
Java
3 contributions
Savannah Holly
Java
3 contributions
Anish Thiriveedhi
Java
3 contributions
Joy Wan
Java
3 contributions
Jainil Modi
Java
3 contributions
Vansh Sikka
Java
3 contributions
Vansh Gupta
Java
3 contributions
Will Otani
Java
3 contributions
Havish Rani
Java
3 contributions
Lenna Park
Java
3 contributions
Ananyaa Tanwar
Java
3 contributions
Meghna Mavila
Java
3 contributions
Josh Joseph
Java
3 contributions
Wendy Ruan
Java
3 contributions
Chengze Shen
Java
3 contributions
Nishit Samarth
Java
3 contributions
Becky Blake
Java
3 contributions
Gabriel Grais
Java
3 contributions
Aden Krakman
Java
3 contributions
Juyoung Choi
Java
3 contributions
Qingping Ye
Java
3 contributions
Kavin Krishnasami
Java
3 contributions
Helen Ilkiu
Java
3 contributions
Athena Fung
Java
3 contributions
Tyler Cushing
Kotlin
3 contributions
David Yang
Java
3 contributions
Di Liang
Java
3 contributions
Andrew Kim
Kotlin
3 contributions
Eric Ji
Java
3 contributions
Chris Munoz
Java
3 contributions
Joseph Dubravec
Java
3 contributions
Meghna Gaddam
Java
3 contributions
Martina Perez Zuleta
Java
3 contributions
Andrew Lum
Java
3 contributions
Jenny Yang
Java
3 contributions
Eunice Leung
Java
3 contributions
Tianyun Zhang
Java
3 contributions
Elisa Carrillo
Java
3 contributions
Louis Qian
Java
3 contributions
Daniel Gutierrez
Java
3 contributions
Utkarsh Prasad
Java
3 contributions
Ishq Gupta
Java
3 contributions
Daniel Song
Java
3 contributions
Elijah Song
Kotlin
3 contributions
Bilal Karim
Java
3 contributions
Alekhya Nathella
Java
2 contributions
Harshit Bagla
Java
2 contributions
Daniel Dilan
Java
2 contributions
Sarod Nori
Java
2 contributions
Samuel Hurh
Java
2 contributions
Ayah Jaber
Java
2 contributions
Adrian Russo
Java
2 contributions
Shao-Min Yeh
Java
2 contributions
Janani Jayanth
Java
2 contributions
Rohan Sathe
Java
2 contributions
Alex Che
Java
2 contributions
Jake Vile
Java
2 contributions
Tanay Pareek
Java
2 contributions
Kangyu Feng
Java
2 contributions
Ken Kim
Java
2 contributions
Brandon Dinh
Java
2 contributions
Ishan Khandelwal
Java
2 contributions
Tina Dou
Java
2 contributions
Emmanuel Buabeng
Java
2 contributions
Yiche Liu
Java
2 contributions
Alma Zirojevic
Java
2 contributions
Anna Fedczuk
Java
2 contributions
Armin Rafieyan
Kotlin
2 contributions
Ricky Chen
Java
2 contributions
Anna Liu
Java
2 contributions
Vaibhav Keshari
Kotlin
2 contributions
Allen Guo
Java
2 contributions
Rahul Bhatt
Java
2 contributions
Brenda Hariyanto
Java
2 contributions
Edmon Guan
Java
2 contributions
Sabrina Tu
Java
2 contributions
Dawn Lim
Kotlin
2 contributions
Joseph Chan
Java
2 contributions
Yasmine Munoz
Java
2 contributions
Jier Miao
Java
2 contributions
Tianyi Huang
Java
2 contributions
Michael Rheintgen
Kotlin
2 contributions
Lou Zeh
Java
1 contributions
Juan David Campolargo Hoyos
Java
1 contributions
Ethan Miranda
Kotlin
1 contributions
Mayank Hirani
Java
1 contributions
Aditya Shreenivas Kunte
Java
1 contributions
Siddharth Tangri
Java
1 contributions
Carlos Conley
Kotlin
1 contributions
Vinayak Manepalli
Java
1 contributions
Varun Shroff
Java
1 contributions
Rohan Khatu
Java
1 contributions
Adrian Rodriguez
Java
1 contributions
Tongyun Huang
Java
1 contributions
Shruthi Jaganathan
Java
1 contributions
Nicholas Jung
Java
1 contributions
Dazhen Chen
Java
1 contributions
Cindy Su
Java
1 contributions
Jason Wu
Java
1 contributions
Jason Barnett
Kotlin
1 contributions
Siyuan Ding
Java
1 contributions
Anish Jampana
Java
1 contributions
Matthew Czech
Java
1 contributions
Aadarsh Krishnan
Java
1 contributions
Raghav Anand
Java
1 contributions
Edward Huang
Java
1 contributions
Abhi Vinnakota
Java
1 contributions
Meghan Lu
Java
1 contributions
Jimmy Berg
Kotlin
1 contributions
Aryan Vakharia
Java
1 contributions
Connor Flynn
Java
1 contributions
Aaron Taub
Java
1 contributions
Nehal Tangudu
Java
1 contributions
Anisha Raja
Java
1 contributions
Thomas Zelichowski
Java
1 contributions
Blair Wang
Java
1 contributions
Keshav Trikha
Java
1 contributions
Jessica Ho
Java
1 contributions
Hamiz Anjum
Java
1 contributions
Ziyin Wang
Java
1 contributions
Simon Li
Java
1 contributions
Ram Goenka
Java
1 contributions
Dj Figueiredo
Kotlin
1 contributions