Environmental Engineering Reference
In-Depth Information
As seen in Figure 8, we divide all the Z-Writers in a classroom to groups of 6. One of them
equips a sub-server with an enhanced antenna. It acts as both a receiver and a relay. It
collects the data from the group and relay them to the Bluetooth master in the host
computer. In this network, each computer can handle up to 7 groups or 42 Z-Writers. That is
enough for most classes and more than the maximum capacity that a teacher can handle at
the individual level without a teaching assistant. For the larger classes with the help of
teaching assistants, a local network of multiple computers or an outright change to using
802.11 can be employed. However, these are beyond the topic of this discussion.
Fig. 8. Set up of a Classroom Response System.
The host computer on the teacher's side collects all the data from the sub-servers and save
them into a database. A preview program converts the data into pixel points and display
them in a preview window like the left part of Figure 9. With a quick glance, the teachers
can have an instant view of how the students are performing. When the teachers need to
annotate an individual student's work, they can select and magnify the one of interest and
display it as seen in the right half of Figure 9 for in-class review and analysis.
Fig. 9. Display in teacher's computer screen. Left: Real-time preview with all inputs. Right:
Magnified view of individual answers.
Search WWH ::




Custom Search