At the chalkboard, I use only Hagoromo faru ta’chi (“Full-Touch”) chalk, for which it has been claimed that it is impossible to make a mathematical mistake when writing with this chalk.
I always like a good The Setup.
At the chalkboard, I use only Hagoromo faru ta’chi (“Full-Touch”) chalk, for which it has been claimed that it is impossible to make a mathematical mistake when writing with this chalk.
I always like a good The Setup.