成人快手

What can you do in half an hour? Children discuss what they can do in that time with examples from their lives. Sabrina is shown how to find half a clock face by folding it in half, and uses this to move the minute hand to show half past. The fact that this is 30 minutes is noted and provides opportunities to relate half of sixty minutes to half an hour. Sabrina meets an Olympic athlete and discovers she can swim around 120 lengths in half an hour. In order to time the athlete, Sabrina needs to work out how many lengths she can swim in one minute (four) - and how long it takes to swim each length (15 seconds).