As Figure 1 shows, other than city1,
more than 80% teachers in the other four
cities use PPT to present teaching content in
the classroom (including “almost in every
class,” “often,” and “occasionally”). However,
difference exists among cities with 9.1%,
8.3% and 10% teachers from city2, city3, and
city4 respective make use of PPT in every
class, whereas no such extreme case is found
in Shanghai. There is no teacher in city1
choosing “almost in every class” and “often;”
those who choose “occasionally” and “seldom”
account for 63.6% and 18.2% respectively.
Nevertheless, there is no significant difference
among different cities (χ
2
=13.348, p>0.05).