American Computer Science League (ACSL)
One
of the oldest computer science competitions with more than 40 years’ history
Approved
by the National Association of Secondary School Principals (NASSP)
Authenticated
by the Computer Science Teachers Association
Sponsored
by Google, Adobe and other advanced technology companies
Winners
of Rounds 2-4 will be invited to the ACSL All-Star
You Be The Chemist Challenge®
Advancement system
Elementary Division
Language: English
Composition:
● Round 1 (Top 65% enter Rounds 2-4)
● Rounds 2-4
Date and Time: 13:00-13:30 (30 mins), GMT+7 Vietnam Time
● Round 1 (Qualifier Round): Dec. 13, 2026 (Sun.)
● Round 2: Feb. 13, 2027 (Sat.)
● Round 3: Mar. 13, 2027 (Sat.)
● Round 4: Apr. 17, 2027 (Sat.)
Form: Online
Content:
- Round 1: 5 multiple choice questions in 30 minutes. 1 point for each question. The full mark is 5 points. Subject to the actual number of questions.
- Round 2-4: 6 multiple choice questions in 30 minutes. 1 point for each question. The full mark is 6 points. Subject to the actual number of questions.
Eligibility: Elementary school students (Grade 3-6 / Year 4-7) with no programming experience can attend.
Note: Students may register for higher divisions, but not lower ones.
Skilled elementary students can pick Junior / Intermediate / Senior; capable junior high students can choose Senior. Senior students cannot sign up for Elementary or Junior, and junior high students cannot enter Elementary.
Asian Awards
● Perfect Score: Get a perfect score in Rounds 2-4
● Individual top students: Top 20% individuals in Rounds 2-4
● Excellence Award: Top 55% individuals in Rounds 2-4
Deadline:
● Round 1 (Qualifier Round): Nov. 30, 2026
● Round 2: Jan. 30, 2027
● Round 3: Feb. 28, 2027
● Round 4: Apr. 02, 2027
All-Star Contest
Language: English
Eligibility: Awarded students in Round 2-4
Date: Aug. 2027 (TBD)
Form: Online
Content:
● Individual Written Contest: 60-minute exam
* The detailed arrangements are subject to the announcement before the event.
Awards
Global Awards
● Gold, Silver, Bronze
* Above the score set by the committee
Asian Awards
● 1st, 2nd and 3rd place
● Gold: Top 10%
● Silver: Top 20%
● Bronze: Top 35%
● Honorable Award: Top 50%
Note: Points from Rounds 1-4 will not be counted in the All-Star Contests
Junior & Intermediate & Senior Division
Language: English
Composition:
● Round 1 (Top 65% enter Rounds 2-4)
● Rounds 2-4
Date and Time: 13:00-15:40 (160 minutes, GMT+7 Vietnam Time)
● Round 1 (Qualifier Round): Dec. 13, 2026 (Sun.)
● Round 2: Feb. 13, 2027 (Sat.)
● Round 3: Mar. 13, 2027 (Sat.)
● Round 4: Apr. 17, 2027 (Sat.)
Form: Online
Competitors: 3 students per team (at least 2 students)
Content:
Round 1:
● Part 1 (Individual Round): 5 multiple choice questions in 30 minutes. 1 point for each question. The full mark is 5 points. (Subject to the actual number of questions.)
● Part 2 (Team Round): 1 programming question in 2 hours, worth 5 points.
Round 2-4:
● Part 1 (Individual Round): 6 multiple choice questions in 30 minutes. 1 point for each question. The full mark is 6 points. (Subject to the actual number of questions.)
● Part 2 (Team Round): 1 programming question in 2 hours, worth 6 points.
Round 2-4 qualification: The top 65% of teams and individuals from Round 1 are invited to attend Rounds 2-4.
Grading:
● Individual scores: individual written scores + individual programming question scores
● Team scores: team multiple choice question average scores + team programming question average scores
Note: Experienced lower grade students can choose higher level contest. For example, primary school students with good programming skills can choose senior, intermediate or junior contest, and junior school students with strong programming skills can choose the senior contest. However, high school students can’t choose lower level contests.
Asian Awards
Individual Awards
● Perfect Score: Get a perfect score in Rounds 2-4
● Top Scores: Top 20% individuals in Rounds 2-4
● Honorable Award: Top 55% individuals in Rounds 2-4
Team Awards
● Gold: Top 10% teams
● Silver: Top 25% teams
● Bronze: Top 35% teams
● Honorable Award: Top 55% teams
(Note: Reward by different levels. Team members who miss one round at most can receive team awards.)
All-Star Contest
Language: English
Eligibility: Awarded students in Round 2-4
Date: Aug. 2027 (TBD)
Form: Online
Difficulty: Junior, Intermediate and Senior Division. Participating teams can only choose the same difficulty as the previous rounds.
Contest:
● Written Contest: Individual Round (Answer independently). 60-minute exam consisting of 20 multiple choice questions. (Subject to the actual number of questions.)
● Programming Contest: 3 students per team (at least 2 students). 2 Programming problems scored with 10 points per question. All members of the team are required to answer and submit answers. (3 hours)
* The detailed arrangements are subject to the announcement before the event.
Awards
Global Awards (only individual)
● Gold / Silver / Bronze (Above the score set by the
committee)
Asian Awards
● 1st, 2nd and 3rd place
● Gold: Top 10%
● Silver: Top 20%
● Bronze: Top 35%
● Honorable Award: Top 50%
Points from the Regular Season are not counted in All-Star Contest.
Registration Details
Includes the exam, grading, proctor fee, past-papers, certificates.
REGISTRATION DEADLINE FOR ROUND 1 (QUALIFIER ROUND):
30 November 2026
SIMILAR PROJECTS
