Pro-tip: Get a chalk holder. In winter especially, the feeling of chalk dust on my fingers is just disgusting. It gets all over my clothes and my hands and I just accepted that horrible situation for years. But, there is another way! One of the third grade teachers had one of these. I grabbed it and used it in class and was blown away. Not only does this puppy have a thick, pen-sized barrel, but the cap has a powerful magnet to stick it to the chalkboard when not in use. Never have to hunt for scraps of chalk on the fly ever again! I carry this in my regular pencil case. No mess! I got mine at Tokyu Hands, but they sell it on Amazon.co.jp for pretty cheap, too.