SUPPORTING NOTES FOR LESSON 1 |
If your pupils have not experienced one of these cases before, they may query why they are ‘not doing maths’. You may need to make a comment at this stage "that the maths will emerge", but it is important not to say what this is or how it comes about before the pupils have engaged with the issues in the next lesson.
The game of cricket is played on a large oval or circular ground. The pitch is a strip 22 yards long in the centre of the ground. There are three stumps at each end of the pitch. Each set of stumps has two bails resting across the top. A crease line is marked 4 feet from the stumps at each end of the pitch. The batsman’s “ground’ is the space between the stumps and the crease line. The batsmen make ‘runs’ by running to the other end of the pitch after they hit the ball.
A batsman is out by ‘run out’ if he is out of his ground when the bails are knocked off the stumps by the opposing players before he has ‘made his ground’ at the other end of the pitch. To avoid being run out, the batsman needs to have at least the tip of his bat over the crease-line and touching the ground before the bails are dislodged.
Students need to understand that in a run out, it is the position of the bat as the bail is dislodged which is the critical factor. If necessary, ask pupils to explain the run out rule to their peers until each person understands it clearly. This should include the situation of the bat being ON the crease-line when the bails are removed (in this case the batsman is OUT).
Teachers may like to bring a set of stumps and bails, together with a bat, into this lesson. Some students may demonstrate the run-out rule to their peers using this equipment. Rulers or chalk lines can be used to simulate the crease-lines. To demonstrate a 'run out' does not need the exact equipment, rather the students need to get a good understanding of the rules for in and the rules for out. Hence if traditional cricket equipment is not available, a metre ruler (the bat) and a rubbish bin (the stumps) may be used (be aware that you will need to place an object on top of the bin to act as a bail - it is possible in cricket for the ball to hit the stumps without dislodging the bail. It is only when the wicket (stumps and bails) is broken can a run-out be effected). Some teachers may feel that having pupils act out a run out in class may seem risky, but it can have a positive influence on their relationships with pupils via the enjoyment it will generate.
Teaching and Learning Issue 1: The need for Hands on Experience.
Instructions for showing video clips
There are two options for showing the video clips.
The first option opens the video clip in a Windows Media Player (or your preset Player) for the teacher to view. To view the clips in this way, left click on the link and select "open".
The second option allows the teacher to download the clip, by right clicking on the link and downloading it to the teacher's computer. These video clips are in .wmv format for playing with Windows Media Player. Once downloaded you can play them by following the instructions below.
If you are planning to show the .wmv video clips with the Windows Media Player you can slow them down and/or show them frame by frame.
Double click on any of the files with the .wmv file extension and the Windows player should auto load.
If it doesn’t or some alternate player loads you should be able to find it listed under the Program files (Start /Programs /Accessories /Entertainment /Media player)
Once the file is loaded in Windows media player select the drop down menu option in the top LH corner under “Now Playing”
Select “Enhancements” and the “Play Speed Settings” in the next menu to appear. The graphic below will appear in the bottom LH corner of your player screen.
Hit the play button arrow at the bottom and then near to the action you want to see in slow motion hit the pause button (same arrow now with pause feature displayed). The video will pause.
Using the left or right arrows near the time read out you can advance one frame at a time forward or backwards in the video by simply clicking with the mouse.
There are some other speed features available which you can explore. Enjoy!
A good list may include:
1. the speed of the batsman | 7. the weight of the bail |
2. the distance the bail has fallen | 8. the weight of the bat |
3. the time it took for the bail to fall that far | 9. the weight of the ball |
4. the distance of the tip of the bat past the crease-line | 10. the speed of the ball |
5. the time the tip of the batsman’s bat has been past the crease-line | 11. the looks on the fielder’s faces |
6. whether the bail fell in a straight line | 12. other ideas? |
In order to obtain more reliable estimates for each, pupils will need to use the standard measurements of crease-lines, bats and stump height.
Standard stump height is 28” = 71.1 cm.
The distance between the stumps and the crease-line is 4 feet (122 cm).
2. In mathematics, a variable is a quantity that can take different values.
3. Variables on a train journey include:
the length of the journey (in miles or kilometers),
time taken for the journey;
varying costs of train tickets,
the number of stations that you might pass on the journey,
the number of carriages,
the number of passengers.