I am a great believer in timing. There is no use being accurate but taking 65 minutes to finish a 50 minute test. The child needs to understand its not a Sunday afternoon drive in the country. Speed and accuracy need to be practiced.
I arrange for parents to time tests from the very first paper. They line off at 50 minutes and carry on, noting the extra time to finish. I will then record 2 marks one for in time and one for out of time. Quite obviously in the beginning they do not complete test in time, but practice and a few tips [to follow] will eventually get the desired results. Keeping a record gives the child a sense of achievemnet.
I do not 'allow' whole sections to be left out. Once they they know the techniques, there is no need to. Some children think by leaving out whole sections of codes they will finish faster. NO. They will still have to complete them in the end, they will still take a long time, but they are now feeling the pressure because they still have to do the dreaded codes.
Bribery goes a long way too. [thats not for passing the real test!] smiley stickers for passing, extra stickers for improving timing, every 10 stickers a small gift [my children are very happy with a bar of chocolate.]
Tips for speeding up, see the following link...