what does R-value stand for?
A clear and flat glass plate is usually sprayed on the back with a thin coating containing a silver or highly reflective silver - like material. Many well polished metallic surfaces are highly reflective. Aluminum is one. Chrome is another. And silver. Silver was probably the one first used for mirrors because it was the first to be available.
I don't think you will be teaching her bad habits by using a straight snaffle. All bits are designed for different purposes and one that works for one horse may not work for another. The only problem I can see with this is that she may not be as responsive with other bits but I can't see that would ever be an issue. You're the one working her and using the bit and if you feel like its working then I'd say continue using it :)
Sorry, but what you think you know isn't correct. Gas for driving to work is a commuting expense and not deductible. And clothes for work are only deductible if they are uniforms or clothes unsuitable for any wear other than work - it doesn't matter whether you WOULD or DO wear them anywhere else - and can only be deducted if you itemize, and even then you can only deduct the amount greater than 2% of your income, so it's pretty unlikely those would be deductible either. If you are not a dependent, you can very likely take an education credit for your tuition and fees.
