11.   A school in which a large percentage of students takes an exam will likely produce lower average scores than a school in which only top-flight students participate.

12.   But a faculty vote last spring urging MIT to allow all students to participate in ROTC activities has largely been stymied by a federal law passed in December.

13.   But his emphasis was elsewhere, as he visited a first-grade classroom in which students participated in a character education program.

14.   But students can participate only if the school offers the program.

15.   Butler said he also hoped to make a satellite telephone call to the class so that students could participate.

16.   Fifty yards from where Hutchen spoke of the need for a military response, several dozen students were participating in a peace rally.

17.   Frank Serafini, a Garcia teacher for six years, answers that question by refusing to let his students participate in the program.

18.   Interior design students participated by selecting brick and roof colors, interior and exterior color schemes and wallpaper borders.

19.   It would not affect sales on school grounds or activities like car washes where students participate as a group.

20.   Janey said he did not know how much such a program would cost to implement or how many students would participate.