Mr Johnson will say Britain is a nation built from and by people from other countries.
"I believe passionately that schools can and should play a leading role in creating greater community cohesion and combating ignorance of other countries, religions and cultures," he will say.
"By 2010 one in five pupils in our schools will be from an ethnic minority - this is a challenge but also an opportunity to instil a culture of understanding and tolerance at an early age.
"The values our children learn at school will shape the kind of country Britain becomes."
I'm amazed that this kind of lesson isn't common practice already. I'm not looking for classes full of jingoistic little englanders marching jackbooted in step to music from the last night of the proms. I just expect a little sense of team spirit, national purpose and community. A cadet after school group in every school wouldn't hurt either.