The weeks 4 - 8 mean that you only do that lecture or prac etc on those weeks specified. The G and H are what groups you will be put into. On orientation day you should find out what group you are put into. For example, Thursday afternoon 1:05 - 1:55pm...
Radiation Therapy 1A (prac) - RT3
wks 8-13 M112
Intro Clin Ed. (p)
G - weeks 3,6 M117
H - weeks 4,7 M117
Group G starts Intro to Clinical Ed in week 3. Then H goes in week 4. No one is week 5. G goes week 6 and H goes 7. Then the subject changes to Radiation Therapy 1A (Prac) and all students are required from Weeks 8 - 13. The same applies to the next time period. 2:05 - 2:55pm except on weeks 6 and 7 there is room changes. Does that help a little?