In this activity, students are calculating the time differences in the time zones of the United States using the central time zone as a fixed point. There are analog clocks images with different times on them listed in activity. Students click and drag clocks to the appropriate time zone on the map. If students are incorrect, the interactive provides an opportunity for them to see the correct answer and to compare their own answer with the correct answer.
This activity can be played as a whole class, in pairs/small groups or individually.
Have students first find the central time zone and talk about what time it is on the analog clock for an important way to start the activity. Have students read the times on the analog clocks before placement to ensure that the correct times are used (this provides teacher the opportunity for a quick formative assessment of time to the hour on an analog clock). Students can take turns choosing a clock and placing it in the appropriate place on the map. Students should explain their choice (i.e. This time is 2 hours after the time on the clock in the central time zone so I need to move this over two time zones) providing an opportunity for reinforcement of the concepts presented.
Students who need a challenge can continue the time zone calculations across the Atlantic and through Europe. For students who are struggling, consider printing out a map and having them number the areas by 1 greater or 1 less and then cut out the clocks and match the times this way. Then they can return to the interactive and complete it again.