Block based programming lesson 3 (Mr Evlat)

• Computing
• Lower Secondary (Key Stage 3)

Lesson 3: Block based programming

Understanding the fundamentals of programming

What shapes will be drawn by these snippets of code?

1.

2.

1. Rectangle

2. Square

Lesson objectives 

Conquer: Understand the purpose of conditional statements. 

Aspire: Apply conditional statements to your programs.

 

 

Aspire: Create a set of loops to make a program more efficient.

Previously we have made use of two very important concepts in programming.

• Sequencing - Creating a set of instructions in order.
  

• Loops - Make a set of instructions repeat.

Conditionals/If statements

If it is raining

Put a coat on

Dont put a coat on

TRUE

False

• If statements are used in programming to make decisions based on conditions being true or false.

We need to check if the bee is hovering over the flower to collect its nectar.

To do this we perform an if statement. 

We use our loop block to repeat the sequence of code until we have collected all the nectar on the path

Drag and drop to fill in the gaps in the code so the bee collects all the nectar!

Move Forward

7

If at

Get nectar

What is a conditional/If statement?

1. A true or false decision in the program
2. A section of the program that loops.
3. A set of instructions in order.
4. An error in the code.

What is sequencing?

1. A block of code that repeats until a condition is met
2. A set of instructions carried out in a specific order.
3. A type of programming mistake that stops a program running
4. A question that makes a program choose between two options

Quiz should take 3-4 mins, allow time on later questions for students to read through the code options to figure out which option is correct. 

What is a loop?

1. A command that checks if a condition is true or false
2. A set of instructions that must be followed in order.
3. A repeated section of code that runs multiple times
4. The end result of your program.

Paired programming task

Partner A will be the only person programming, Partner B will tell them what blocks to use

Click here

Complete all 15 levels together!

Give majority of lesson time for students to practice skills. 

20 to 25 mins. 

Extension hidden behind animation if need that brings together multiple skills. dont show or students may click on this first.