This 41 slide ready to teach presentation for IB DP Environmental Systems and Societies for unit 2 part 3 (Biogeochemical cycles) & 2.4 (Climate and biomes) with content, tasks for students and additional links includes:

How does an Ecosystem work?
Primary productivity, secondary productivity, GPP, NPP, GSP & NSP
Types of productivity
Biomass and Productivity
Gross Primary Productivity
Net Primary Productivity
Gross secondary productivity
Net Secondary Productivity
Energy Flows, Materials Cycle
Gross vs. Net Productivity
Gross Secondary Productivity (GSP)
Net Secondary Productivity (NSP)
The Carbon Cycle
Seasonal Fluctuation in Atmospheric CO2
Nitrogen in the atmosphere
Nitrogen: flows and storages
The Nitrogen Cycle – 3 basic stages
Human Impacts on Energy Flows
The Haber Process
Energy flow diagrams
Links to video and tasks for students