Least Common Multiple (LCM)

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⚠️ This material is an adapted activity with questions (it is not a complete theoretical workbook on the topic).

Number of questions in the activity:
5 adapted activities + complete answer key, involving least common multiple (LCM), multiples, divisors, numerical sequences, organization of materials, schedules, alarms, and traffic lights.

Target Audience:
Students in Middle School, High School, Youth and Adult Education (EJA), and Specialized Educational Support (AEE).
Especially recommended for students with Intellectual Disabilities (mild to moderate), ASD, ADHD, Down Syndrome, and difficulties in Mathematics.

Format:
Color printable PDF with strong visual support (number sequences, school kits, alarms, clocks, and traffic lights), simple uppercase language, interactive activities (completing sequences, multiple choice, visual interpretation, and identification of mathematical patterns), and answer key included.

Important for the teacher:
This material was developed as a practical activity with questions and can be used as:
✔ content introduction
✔ learning reinforcement
✔ adapted remediation
✔ adapted assessment

Key Features:

✅ Teaches LCM in a concrete, visual, and highly accessible way.
✅ Explains multiples and divisors using simple and organized number sequences.
✅ Uses school kits to contextualize divisibility and grouping concepts.
✅ Develops perception of mathematical patterns through repetitions and sequences.
✅ Works with divisors of 12 in a visual and concrete way.
✅ Explores the concept of LCM using alarms that ring at different intervals.
✅ Problem situation with traffic lights helps students understand the idea of a “common moment.”
✅ Connects Mathematics to everyday life through schedules, clocks, and practical organization.
✅ Develops logical reasoning and comparison of time intervals.
✅ Progressive teaching sequence: observe → identify patterns → relate → solve.
✅ Simple language with strong visual support, reducing mathematical abstraction.
✅ Promotes autonomy even for students with difficulties in formal calculations.
✅ Can be used in regular classrooms, AEE, or individual support.
✅ Ready-to-use adapted assessment.
✅ Saves 2h45min of teacher planning time.