1. A method comprising: providing, by one or more processors, a first instruction to a first user; receiving, by one or more processors, a user input in response to the first instruction provided to the first user; determining, by one or more processors, whether the user input is a correct response to the first instruction; and responsive to determining that the user input is the correct response to the first instruction, providing automatically, by one or more processors, a second instruction to the first user.