Front End Bug # 2

Description of Issue:
The tabs for English and Computer Science do not work on the second level.

Reproduction steps:
1. Open up index.html file in any web browser.
2. Select the Computer Science tab.
3. Try to select any of the second layer tabs.

Expected Behavior:
The second layer must be able to be selected for the user.

Notes:
1. This issue also occurs with the English tab in step [2].
