Here are the most effective ones - and the worst.

Cheaper and more effective ones might appear in the next few years, the officials told reporters.

Crude techniques for putting one's subject on edge, yet quite effective ones.

"The most effective ones may well serve as models for state and Federal support."

Ohio thus offers desperate families a "choice" between failed public schools or safe and effective religious ones.

Now, the office is working on refining the ideas so it can present the most effective ones to the president.

Others produced quite different actions, often simpler and less effective ones.

Sometimes the most extreme measures are the only effective ones.

They can be screened to find the most effective ones.

The priority for us at the moment is not to add new regulations, but to make existing ones operational and effective.