I am often invited to speak in different schools about FOSS or web development and I’ll be putting up my presentations (both related and non-related to FOSS and WebDev) here, just in-case I need them and I forget to have them with me.
All presentations are created with OpenOffice and are under a CC-BY 3.0 license, which means you get to use and/or modify it as long as you give credit, at least linking them here. 
SFD 2009 (pdf) (source) — my presentation at UST on September 2009. Contains your run-of-the-mill introduction to open source presentation.
Power Plants (pdf) (source) — Env. Sci. 1 report about power generation and sustainable power options