Which of the following is NOT one of the six constitutional FFA offices?

In the context of the FFA (Future Farmers of America), the six constitutional offices are designed to support the organization's structure and functions. These offices typically include the President, Vice President, Secretary, Treasurer, Reporter, and Sentinel. Each of these roles has specific duties that contribute to the smooth operation of a local chapter and the broader objectives of the FFA.

The correct choice is the manager, as this title does not exist within the constitutional framework established for FFA offices. While managerial roles may exist informally or in other contexts within an organization, they are not recognized as official offices in the constitutional framework of the FFA. Therefore, the mention of the manager does not align with the established list of constitutional offices, thereby rendering it the correct answer to the question.