Have a go at the Power Lines challenge. See what level you can get to. Remember its all about moving the numbers so that they pair up well.
If you want to comment and suggest tips for completing different levels (level 4 is particularly tricky), then comment below.
Mr Cobb's Class Blog 
N.A
October 6, 2007 at 3:30 pm
Hello Mr. Cobb,
I have completed the Power Lines challenge for phase one .
You have to buy phase two on a CD.
W.E
October 8, 2007 at 5:49 pm
Hello mrc.
i have got phase 2 and compled that and there is a phase 3 also on cd phase 2 is harder but good
WJ
October 9, 2007 at 3:22 pm
Hello Mr Cobb
I have done level 8 so got password for phase 2. It was easy so far & fun
WJ
ts
October 9, 2007 at 3:33 pm
I conpled the power line challenge in a minit it was fun.
JH
October 9, 2007 at 7:16 pm
hi mr cobb
i have completed the powerlines puzzle some of them were easy and some of them were hard but i really enjoyed it.
FM
October 11, 2007 at 6:45 pm
Hi Mr Cobb
I had completed level 5 on powerlines but it was really really hard. Most of the levels were actually quite easy,but I s till really enjoyed it even though some of the levels were really hard.