at the top of the/ agenda

at the top of the/somebody's agenda  also high on the/somebody's agenda

if a subject or plan is at the top of someone's agenda, it is the most important thing they want to discuss or deal with The government has put education at the top of its agenda. When the schoolteachers meet, classroom violence will be high on the agenda. (= one of the most important subjects to discuss)

See also: agenda, top