Planning Labs: These are the kind of things I submitted to the IB.
"General Prop Labs" - give them a prop and see what they can come up with. For example, a chunk of clay, a balloon, small magnets, iron rods, rubber bands, electric motors... I liked to give the kids options too, give them a range of props.
Bottle Draining Lab - Get a plastic bottle, drill a hole, look at the rate of draining or the total time to drain vs hole size.
Measuring Magnetic Force - simply investigate the force vs. range for two magnets. Exploring how the magnetic field relates to forces between magnets.
Exploration: Great way to get kids to learn on their own...
Exploring Vectors - My first couple of days for year 1. Gets them thinking...
Uncertanity Lab (Excel - Word) - The excel spreadsheet generates random data for a cylinder rolling down a ramp. The students can copy the data and "paste special" into their own excel sheet. Each student then has their own data and own results! The word document has step by step directions to help the students.
Circuit Basics - Just an exploration of ciruits, hands on learning. Worked great.
Magnetism Exploration - Same idea, kids learn better with their hands than with their ears.
Optics Exploration - Take a guess.
Review Labs: I used these with my SL students as reviews.
Proving Newtons's 2nd Law - Not the F=ma but the other one... Let them come up with a method.
Measuring the temperature of a flame - Using heat capacities to get a ball park figure for the temperature.
Crocodile Physics: A great program, computer simulations simplify the physics for the students (I learned this was a VERY good thing) and a great way to get some lab hours (we were a laptop school).
Marked Examples: I have put these here to give an example of my expectations and how I marked labs. Both of the labs are examples of the Planning variety described above. I have hopefully removed all names and have locked the documents... If you happen to be the author, you should be doing your college homework not looking up IB stuff!