instrumental

Teachers say her boy is thriving, but Diane says the school has been instrumental in supporting his special educational needs and improving his speech and language.

Abdu Husain, 28 from Cardiff was described as being "trusted and instrumental in the supply chain", and as being particularly aware of law enforcement tactics.

Kirk, a founder of Turning Point USA, has been instrumental in recruiting young Americans on college campuses to GOP voter rolls, making himself an indispensable part of Republican campaigns.

Kirk, a founder of Turning Point USA, was instrumental in recruiting young Americans on college campuses to GOP voter rolls, making himself an indispensable part of Republican campaigns down ballot across the country.

He was instrumental in the New Labour project which saw Tony Blair win the 1997 election with a huge landslide.