Anyone or Any one?

Does "anyone" mean the same as "any one?" When spoken they sound identical, but when written they have different meanings.

Use "anyone" when you mean any person whatsoever (cualquier persona). For example: Anyone can do it. (Cualquier persona puede hacerlo.)

Use "any one" when you mean one person out of the group. For example: Any one of the cashiers can help you with your purchases. (Cualquier de los cajeros puede ayudarte con tus compras.)

Shall or Will?

In Podcast 1 I say "I shall assume that your English is proficient enough to follow most of what I am saying." You may wonder why I said "I shall" instead of "I will." Both are correct. Many years ago schools taught that for the first person singular (I) and the first person plural (we) one should use "shall" and for the second and third persons singular and plural (you, he, she, it, they) one should use "will." Today both are considered correct, and in fact, you are more likely to hear "I will" than "I shall." The contraction for both is "I'll."