"Timely intervention" refers to taking action or helping someone at the right moment, when it is most needed or when it can prevent a situation from getting worse. Full definition
Early detection, recognition, and timely intervention of medical conditions are the key to a long, healthy life. (tri-cityanimalclinic.com)
Of course it does little good to administer formative assessments and track student progress if plans aren't in place for timely intervention when students struggle. (timwesterberg.com)
He believes that high quality curriculum and instruction supported by assessment and timely intervention when students fall behind is a much more effective approach. (gse.harvard.edu)