When designing learning environments, there are some essential principles that should be in place.

Second, a set of concepts are listed, organized into six to nine big ideas or essential principles.

"But we're not going to sacrifice the essential principles of this legislation."

Good potato salad depends on a couple of essential principles.

Its essential principles are three: (1) The improvement of this life by material means.

Many amendments were accepted by the Council, and some of them propose again particularly important, not to say essential principles.

At the same time, with respect to these questions, there are, in my view, three essential fundamental principles.

In my view, this is an essential principle which must be observed.

The Commission would not want to abandon the essential principle of collective responsibility.

Division into parts serves as an essential principle of growth in his imagination.