Specialisation Area

MTeach Computer Studies (Secondary)

Topic

Logic gates

Target audience

Year 9-11

Logic Gate Simulator (Online App)

(http://www.cs.kent.edu/~volkert/F10-10051/notes/logsim.html)

(http://www.neuroproductions.be/logic-lab/)

Logic Gate Simulator (PC Software)

(http://www.kolls.net/gatesim/)

Use a flowchart or MS Visio to show students step by step the flow from the input to the output at each step for the different inputs.

"Schematic"

Content

Teaching and Student Learning (Pedagogy)

Students should be able to:

1. Combine different types of logic

gates to create specific output

gates

2. Know how to read the diagram

and draw truth table for

combined logic gate

3. Given an output and some inputs,

students should be able to trace

back through the diagram and

find the missing inputs

4. Find errors in the truth table and

explain why the error occurs

Student Learning:

Create truth table for the following diagram

Can create their own truth table to trace back and fill the missing input

Explore the various ways how a combination of various logic gates can replicate another gate for the same input and output (E.g. Creating an OR gate using only NAND gate)

Teaching:

These activities can be done individually, in small groups or as whole class activities

Knowledge Dimension

Plan A

Online flash game can be incorporated in lesson for students to practice on “counting on” information from truth table and logic gates and at the same time, able to distinguish the functions of each types of logic gates while having fun.

(http://www.gameshot.org/?id=4810)

Plan B

Online interactive logic gates

http://www.facstaff.bucknell.edu/mastascu/elessonshtml/Logic/Logic1.html#Example

Plan C

Answering exercise using Ms Visio apps

Plan D

Interactive Whiteboard

"Procedural"

Content

Teaching and Student Learning (Pedagogy)

Technology

Students should be able to:

1. Recognize types of logic gates

2. Understand how each gate works

3. Draw types of logic gates diagram

4. Apply logic gates formula

5. Draw the truth table

Student Learning:

Students will answer from the exercise given by teachers.

Participate in class where teacher will display interactive logic gates.

Ask students to draw the diagram logic gates.

Students analyse information from truth table, interpret and represent the information into a logic gates diagrams; and vice versa.

Teaching:

Draw each type of logic gate digitally.

Teach technique how to remember the gates for each boolean expression.

Recap how boolean expression works.

Illustrate the formula for each gates via truth tables.

Knowledge Dimension

Hardware

Use projector to show the explanation and definition of logic gates and the diagram itself

Software

Using Microsoft PowerPoint slides displaying explanation of logic gates, with interactive circuit diagrams.

Source: http://www.facstaff.bucknell.edu/mastascu/elessonshtml/Logic/Logic1.html#Example

Using Ms. Visio to draw diagrams of logic gates such as AND, OR and NOT gate.

Online flash videos that displays sets of logic gates and at the same time, explaining the types of logic gates

"Declarative"

Content

Teaching and Student Learning (Pedagogy)

Technology

Students should be able to:

1. Explain what Logic gate is.

2. Define binary numbers

3. Differentiate between Binary

1 & 0 (Off/On) or (True/False).

4. Understand Boolean expression

5. Recognise type of logic gates and

function of each logic gates.

6. For an ‘N’ number of inputs, the

highest possible combination for

a gate is 2N where 2 stands for

binary or the possibility of either

‘1’ or ‘0’ (two options) and where

‘N’ is the number of inputs

Student Learning:

Students engage in multiple learning experience such as visually and auditory

Students will do group online activity and present what they understand about the topic.

Student practice recognizing and comparing types of logic gates

Teaching:

After students’ presentation, teacher will show and explain with diagrams about types of logic gates, binary numbers.

Show students the different logic gates & its truth table

Show students that 0 & 1 is on/off

Give students a link to a resource where they can refer to the different logic gates & truth table for their extra reading resources.

Knowledge Dimension

PLAN A

Hands-on practical on the logic gates circuit.

PLAN B

Computer software such as “Logic Gate Simulator” that imitates the function of logic gates; thus has the capability to make any possible combinations of logic gates and gives the outcome of the combinations; in addition to check and compare if two or more combinations have the same final outcome. Then, students able to create their own electronic circuit e.g. for robot control.

"Strategic"

Content

Teaching and Student Learning (Pedagogy)

Technology

Students should be able to:

1. With the knowledge that the

student have learnt, student

would able to create their own

electronic circuit; e.g. Robot

Control / Electric LED circuit

Student Learning:

Students have opportunities to make decisions about making combinations of logic gates to produce desired outcome

Each combinations of logic gates is a student collaboration for investigating the possible combinations types of logic gates and each one of them may be different with other individuals/groups, thus promoting students’ creativity and critical thinking.

Teaching:

This activity can be done individually, in small groups or as a whole class activity.

Teacher facilitates or guides students throughout the activity.

Knowledge Dimension

Technology

Notes

Topic: Logic Gates

Duration: 3 lessons

Lesson 1: Procedural

Lesson 3: Strategic

Lesson 2: Schematic

Explore what is 'Logic Gates'?

Apply the knowledge to practical

Create circuit from the knowledge

Logic Gates

Procedural

Schematic

Strategic

NAND Gate

AND Gate

**Any Questions**

Conclusion

Lesson plan

Teacher teaches using Interactive Whiteboard and Realtimeboard

Students doing the online group activity – divided into groups

Realtimeboard interface

Group 1 doing their activity work

Group 2 doing their activity work

Students’ group work

Inverter or NOT GATE

Is it Useful?

Every digital product, like computers, mobile, calculators even digital watches contains logic gates.

What is Logic Gates?

A logic gate is an elementary building block of a digital circuit. Most logic gates have two inputs and one output which use two binary conditions (0) or (1) only.

OR Gate

Application

Logic Gate

Is it Important?

Our next generation can develop our own brand of computers, handphones, digital watches ,etc without relying to others anymore.

**Group 36**

(Declarative)