Driving lessons changing gears?

Ok im into my 6th lesson driving but im needing a little help, only sometimes can i hear the rev of the engine indicating to change gear, but I was told of a different technique on how to change gears and its to do with ur speed but i cant remember exact I think its



1st gear 0-10 mph

2nd gear 10-25mph

3rd gear 25-????



can any of you help by telling me what mph i need to be at to change to 4th and 5th?Driving lessons changing gears?
You should keep your revs low to save fuel and produce the least amount of carbon emmisions. In order to keep revs low you should change up a gear as soon as you can. Older cars might need leaving in a lower gear for slightly longer to build up power, but newer cars you can usually do 1st 0-10mph, 2nd at 10mph, 3rd at 20mph, 4th at 30mph, and 5th at 40mph. Try it %26amp; watch the revs!Driving lessons changing gears?
every gear gets about 10 to 15 mph in it except 1st. 1st gear is about the first 10.



so for example



1st 0 -10 mph

2nd 10 - 20 or 25 mph

3rd 25 - 40 or 45 mph

4th 45 - 60 or 65 mph

and if there is a 5th 65 - 70 or 85 mph.