ANNOUNCEMENT

# Home Teaching: Key Stage 5

This page is designed to help learners, to continue their computing studies while at home at any time including during the holidays.

### Support is available

If you have any questions about the topic or any of the lesson resources you can contact us by emailing [email protected].

### Object-oriented programming

The following resource links will take you to the FutureLearn website, all resources are free to access, but do require you to sign up for a free account with FutureLearn.

Although this course is described as being 4 weeks long on FutureLearn, weeks 3 and 4 have been split up for the purposes of Home Teaching.

Lesson 1

During lesson 1 you will learn how objects are used in OOP and how to write a program using an object.

Lesson 2

Lesson 3

During lesson 3 you learn how to extend a class using object-oriented programming.

Lesson 4

During lesson 4 you'll learn how to extend classes by introducing new characters into your game.

Lesson 5

During lesson 5 you'll learn the difference between class variables and instance variables.

Lesson 6

During lesson 6 you'll add the finishing touches to your game, and package it so that the classes you have written can be used by other people.

### Number bases and algorithms

The following resource links will take you to the Isaac Computer Science website.

### Lesson 1

Topic: Number bases  Lesson: Unsigned and signed integers

In this lesson you will learn:

• The range of values in unsigned binary
• How to add unsigned binary integers
• How to multiply unsigned binary integers (AQA only)
• How to subtract unsigned binary integers (OCR only)

• How to represent signed integers in two’s complement
• How to convert from binary two’s complement to denary
• How to find the negative equivalent of a positive number
• How to convert from denary to binary two’s complement
• How to subtract signed integers in binary in two’s complement
• The range of values that can be stored in two’s complement
• How to represent signed integers in sign and magnitude (OCR only)

### Lesson 2

Topic: Number bases Lesson: Fixed point numbers

In this lesson you will learn:

• How to convert a fixed point number number into denary
• How to convert a denary number into fixed point form
• How to represent signed fractional numbers in fixed-point form

### Lesson 3

Topic: Number bases Lesson: Floating point numbers

In this lesson you will learn:

• How floating point numbers are represented in binary
• How to convert a floating point number into denary
• How to normalise a floating point number
• How to convert a denary number into floating point form
• Overflow and underflow

### Lesson 4

Topic: Algorithms Lesson: Searching algorithms

In this lesson you will learn:

• How the linear search algorithm works when searching for an item in a list
• The complexity of linear search
• How the binary search algorithm works when searching for an item in a list
• The complexity of binary search

### Lesson 5

Topic: Algorithms Lesson: Sorting algorithms

In this lesson you will learn:

• How the bubble sort algorithm works when sorting the items in a list
• The complexity of bubble sort
• How the merge sort algorithm works when sorting the items in a list
• The complexity of merge sort