Logic Gates & Truth Tables Worksheet: GCSE

A closed-book GCSE worksheet on logic gates for OCR J277 2.4.1: truth tables, diagrams and gate symbols, 20 marks in 30 minutes, with a full mark scheme.

Five short tasks take students from recalling the three gates to spotting what is wrong with a badly drawn symbol. Each task says what its marks are for, so students know what a complete answer looks like before they start.

What’s inside (6 pages, PDF and editable Word)

• Four student pages (pages 1 to 4), answered with notes closed.
• A full mark scheme (pages 5 and 6), with what to accept and what not to accept, follow-through guidance, the completed truth table and both model diagrams. It starts on an odd page, so a double-sided print keeps it off the back of a student sheet.

The five tasks

1. Complete the gate truth tables: AND, OR and NOT, from memory.
2. Name the gate for each system: three everyday systems, each behaving like one gate.
3. Read the diagram, complete the table: a three-gate circuit using NOT, AND and OR, traced through all eight rows a column at a time.
4. Draw the logic diagram: two expressions to draw, each with one gate feeding another.
5. Correct the symbol: three gates drawn wrongly by a student. Say what is wrong with each and what it would do as drawn.

Why it works in a real classroom

• It sticks to the J277 gates. Students draw and use only AND, OR and NOT. Any other shape appears only as a mistake to spot, and no answer needs its name.
• It marks what examiners mark. The scheme marks each drawing the way examiners do, and follows a slip through instead of punishing it twice.
• Editable. The Word version is included, so you can change a name or a scenario to suit your class. The logic diagrams are images.
• Nothing to set up. Print, hand out, collect. There is nothing to install and nothing to log in to.

You need: one copy of pages 1 to 4 per student. Keep pages 5 and 6 back; a cut line marks where the mark scheme starts.

Good for: half a lesson on Boolean logic, homework after teaching 2.4.1, a cover lesson, or Year 11 revision before Paper 2.

Made by a practising computing teacher. The answers are written out in full and checked. If you use it, a review helps other teachers find it.