Ksp: spectrophotometric titration of lead iodide with Ce⁴⁺.
JCE Classroom Activities: hands-on activities that can be done in the classroom or laboratory and/or as a take home project. Journal of Chemical Education site.
Science Teachers Lab Resources: Labs, demonstrations, and other information on chemistry, biology, physics, science, etc. by Patrick Gormley.
The Lab Archive: A very broad listing of labs in all science fields. Everett Community College.
Superconductivity Guides: Middle and high schools. Guides and experiments involving superconductivity.
Doing Chemistry: Project of Am Chem Soc sponsored by NSF. ~134 Chem Expts. Plus videos.
LABS:  Enhancing laboratory teaching at the secondary school level. by the National Science Foundation through ICE. by Marjoire Gardner.
Multi-Initiative Dissemination (MID) Project: Introduces the four NSF Systemic-Change Intiatives in Chemistry. Inquiry based lessons, chem faculty workshops in active learning, new teaching and learning models, assessment.
Oxygen Bomb Calorimeter, simulated experiment and discussion. Bertrand
Educational Inovations supplies for science teachers:
Take-home labs (Brian Rohrig), may give you some ideas:
1. Liquid density column
2. Penny cleaning activity
3. Design your own consumer product and then package it and market it
4. Make cyrstals at home - sugar, salt, Epsom salts, alum, or laundry bluing.
5.  Red cabbage juice testing
6.  give them litmus paper and have them test various substances at home
7. make a 3d model of the periodic table representing differences in atomic radii.
8.  have students repeat various safe demos and labs at home and take a picture of it with the student in it and write on the back an explanation of what is happening - last year I literaly got hunderds of pictures
9. have students do research to determine why gold rings leave a black mark on the skin of some females but not others - they need to test all their friends and then try to come up with a hypothesis supported by research
10.  have students bring in an egg that has soaked in vinegar for a week and then have a naked egg drop
11.  last year, I gave each student a dozen or so unknown white powders and they had to go home and identify them, based on various chemical tests - solubility, starch, etc.
12.  one thing I would like to do but haven't done yet is to give students various stains on pieces of cloth and see if they can remove them without damaging the fabric and then research the chemistry involved.