Of course, bringing about lasting improvement in schools requires more than one lever.

The commission says that lasting improvement requires changing the way that services are designed, funded and monitored.

A study of the effects of adventure therapy on 266 high risk youth in rural areas reported lasting improvement in behavior over a six-month period.

Concern works to help those living in the world's poorest countries to achieve real and lasting improvements in their lives.

Lasting improvements in internal security, however, appeared unlikely without the establishment of functional civilian institutions and some resolution of the status of the former members of the tonton makouts.