21.   At Potrero Middle School in San Francisco, teachers are using blackboards and overhead projectors more often to write down assignments that they used to jot on paper.

22.   Bill McBride pulls a white sheet of paper toward him and draws the kind of curve a teacher might use to explain grading.

23.   But Murphy said she did not expect teachers to use all the lessons or teach an entire year or an entire semester on the famine.

24.   Cooperating with a seed company, the family provides agricultural lessons that teachers can use in the classroom.

25.   Few teachers use technology to challenge their students to think, create and solve problems.

26.   Four out of five teachers use them this fall, according to preliminary results from an ongoing survey of social studies teachers.

27.   History teachers have used it for years to make the Founding Fathers come alive.

28.   Imagine what college students could do if their teachers used the Mimio?

29.   In Arlington, some teachers are already using the kits.

30.   In addition, when trained teachers used computers for higher-order skills, schools tended to enjoy higher staff morale and lower absenteeism rates.