Horace mann is most associated with what issue during the 19th century?

Horace Mann is most associated with education reform during the 19th century.

Explanation:

Horace Mann was an American educator and abolitionist. Horace Mann played a role in creating schools for deaf and mute Americans.

As secretary of the Boston Teaching Commission in 1837, Mann worked tirelessly with all opposition from the educational and theological perspective, annually inspecting Massachusetts educational institutions, gathering teachers and citizens for his lectures, setting up pattern schools, compiling twelve annual reports on the school system, and publishing the journal "The common magazine".

this defines the ability for a flex item to grow if necessary. it accepts a unitless value that serves as a proportion. it dictates what amount of the available space inside the flex container the item should take up.

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a direct vote in which an entire electorate is invited to vote on a particular proposal. this may result in the adoption of a new law.