What can you afford in the Internet Café? Student activity Play

What comes next? Animation Play

What comes next? Whiteboard exercise Play

What comes next? Student activity Play

What is the missing number? Student activity Play

Why are they sums? Animation Play

Work and the time necessary to perform it – part 1 Student activity Play

Work and the time necessary to perform it – part 2 Student activity Play

Write the sum using powers of 10 Student activity Play

Write the sum. Place value Student activity Play

Write the sum. Place value Whiteboard exercise Play

Writing numbers as the sum of powers of 10 Whiteboard exercise Play

Writing on the computer Animation Play

Writing the sum using powers of 10 Animation Play

Written methods Whiteboard presentation Play

Written methods Class activity Play

Written methods Whiteboard presentation Play

Written methods Class activity Play

Written methods Class activity Play

Written methods Whiteboard presentation Play

Würtz reaction Animation Play

 Water Whiteboard exercise Play

 What can you afford in the Internet Café? Whiteboard exercise Play

 What can you afford in the Internet Café? Whiteboard exercise Play