Starting A Coin Club At School

Best advice I can think of is go to the top! Ask at the school office how to go about this.

Here are my suggestions (for what it's worth I'm a teacher in a high school and have helped start a couple of other clubs).

1st: A club with one person isn't really a club. A club with two people isn't really either but it's better than a club with one. Once you get to three people though a club starts to make sense. So ask around to see if there's anyone else interested. One place to ask / put a sign is at a local coin / antique dealer.
2nd: Once you've found a couple of other people who are interested you're going to have to have a sponsor. With a sponsor you'll be able to hold your meetings at school (before or after classes, put up posters, get free advertising in the school paper, etc. It will also really help to have a sponsor lined up for when you get to...
3rd: Ask your grade level principal what to do next. Your sponsor can help with this. Some schools want you to go directly through the principal, some want you to go through the councelling center, some don't know what they want. Every school will go about setting up a club a little differently.

This should get ya started... and good luck. I'm just waiting for someone at my current school to ask me to sponsor one.

OK then ask him to try to get a group of kids together to attend the next coin show. If he is into coins and not just a bragger, he might consider that.
So much depends on many factors for starting a coin club.
1. The ages of the kids your trying to get involved. To young and a coin club would probably not work well.
To old and the interest usually is into the other sex, cars, computers, etc.
2. Location is really important. If in a poor neighborhood, even mentioning coins is not smart. If in a average area, might work. To expensive an area, the parents want their kids to be more constructive than sitting around with coins.
3. If there are any coin stores, hobby stores, coin shows in your area and you can get a parent or teacher to take you if your not old enough to drive, look for cheap coin Folders or Albums. Showing such to others may help get them interested in collecting.
4. Acquire a Red Book to show others the different types of coins, quantities minted and approximate values.
5. If that teacher you mentioned could give a talk about coins to classes or even after school, such get togethers may help start the coin club.
6. Something to remember is crime. In the wrong area or in many areas, advertising you have coins at home is not really to smart. One of the reasons coin clubs fail in many large city areas.

On a further note you could try to convince any teacher that teaches History, how coins could actually help with that subject. If you could get such a teacher to discuss the State Quarters, Presidential dollar coins, Sacagawea dollar coins, etc. Might spark an interest in coins enough to start a club. Discussing who and when each President was and what they accomplished, if anything, also, might spark a coin club interest. For any class in History, the discussion of coins could be more interesting than the actual History Books they use.
Imagine the possible interest if it was noted that there were Massachusetts Colonial Coins issued at one time in and about 1652. Or what is an Eagle in coinage?