Science is Fun
University of Wisconsin: Chemical of the Week: Chlorine and Sodium Hydroxide
Science is Fun website on chlorine and sodium hydroxide. Shows reactions between the two, as well as general background on each.
Science Education Resource Center at Carleton College
Serc: Endothermic and Exothermic Reactions
This lab allows students to collect data for different types of reactions: endothermic and exothermic. Students compile the data, create graphs and answer questions concerning their lab experience.