[tag=IN | word=the] [tag=NN] □
[tag=IN | word=the] [tag=NN] □ □
[tag=IN | word=the] [tag=NN] []
Fracture toughness ( K ) as a function of test temperature ( T ) curves reflect the changing nature of the fracture event with increasing T. The portal-mediated open learning environment will provide K-12 teachers a " digital box " of Berkeley content from which they can create collections of learning objects , access an integrated K-12 curriculum built from learning objects , and participate in Web events in which Berkeley researchers interact with large numbers of K-12 teachers and / or students . Students have the ability to download materials , upload assignments , check their grades , and keep track of class events via a calendar function . There would be an exemption for school events if the sale occurs during a school-sponsored event and it takes place at the location of that event after the end of the school day and vending machines , stores , and cafeterias are used no sooner than one-half hour after the end of the school day .