CS 124

Fall 2026 All Classes

All Classes

Introduction to Computer Science I

Credit: 3 hours.

Basic concepts in computing and fundamental techniques for solving computational problems. Intended as a first course for computer science majors and others with a deep interest in computing.

Credit is not given for both CS 124 and CS 125. Prerequisite: Three years of high school mathematics or MATH 112.

This course satisfies the General Education Criteria in Fall 2022 for:

Quantitative Reasoning I

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CS 124 class schedule data for fall 2026
CRN	Type	Section	Time	Day	Location	Instructor	Section Details
74477	Online Lecture	AL1	ARRANGED	n.a.	n.a.	Challen, G	Availability: CrossListOpen (Restricted) Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course. Section Info: This section is intended to CS & CS+X majors only. These restrictions remain in place throughout registration. This Lecture will be run online asynchronously. Quizzes are in person. https://www.cs124.org/ Please view the following link for restrictions and release dates: http://go.cs.illinois.edu/csregister Restriction(s): Restricted to Computer Science or Statistics & Computer Science or Math & Computer Science or Computer Sci & Anthropology or Computer Sci & Astronomy or Computer Sci & Chemistry or Computer Sci & Linguistics or Computer Science&Crop Sciences or Computer Science and Music or Computer Science & Economics or Computer Science & Advertising or Computer Science & Geog & GIS or Computer Science & Philosophy or Computer Sci & Animal Sci or Computer Science & Education or Computer Science and Physics or ComputerScience&Bioengineering major(s). Restricted to Undergrad - Urbana-Champaign.
75242	Online Lecture	AL2	ARRANGED	n.a.	n.a.	Challen, G	Availability: CrossListOpen (Restricted) Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course. Section Info: This section is for CS minors, NON CS majors, and general campus. These restrictions remain in place throughout registration. This Lecture will be run online asynchronously. Quizzes are in person. Restriction(s): Restricted to Undergrad - Urbana-Champaign. Not intended for CS and blended CS majors students.
74481	Laboratory-Discussion	QBA	10:00AM -10:50AM	T	4025 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74482	Laboratory-Discussion	QBB	10:00AM -10:50AM	T	4029 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74490	Laboratory-Discussion	QBC	11:00AM -11:50AM	T	4025 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74491	Laboratory-Discussion	QBD	11:00AM -11:50AM	T	4029 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74492	Laboratory-Discussion	QBE	1:00PM -1:50PM	T	4025 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74493	Laboratory-Discussion	QBF	1:00PM -1:50PM	T	4029 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74494	Laboratory-Discussion	QBG	2:00PM -2:50PM	T	4025 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74495	Laboratory-Discussion	QBH	2:00PM -2:50PM	T	4029 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74496	Laboratory-Discussion	QBI	3:00PM -3:50PM	T	4025 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74497	Laboratory-Discussion	QBJ	12:00PM -12:50PM	T	4025 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74498	Laboratory-Discussion	QBK	4:00PM -4:50PM	T	4025 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74499	Laboratory-Discussion	QBL	12:00PM -12:50PM	T	4029 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74500	Laboratory-Discussion	QBM	5:00PM -5:50PM	T	4025 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
74501	Laboratory-Discussion	QBN	5:00PM -5:50PM	T	4029 Campus Instructional Facility	Challen, G	Availability: Open Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course.
76898	Discussion/ Recitation Discussion/ Recitation Online	WWC WWC WWC	11:00AM -12:20PM 5:00PM -6:30PM ARRANGED	R M n.a.	Location Pending Location Pending n.a.	Challen, G Challen, G Challen, G	Availability: Closed Part of Term: 1 Date Range: 08/24/26-12/09/26 Degree Notes: Quantitative Reasoning I course. Section Info: This section is for students at Wilbur Wright Community College who will view the online lectures asynchronously while attending required discussions at Wilbur Wright; see your UIUC contact for the specific schedule.