I wan to make a request to #Science#Teachers: When you design labs please design some (most) without step-by-step instructions. The chances of your students needing pipette skills in 10 years is remote. What will serve most student better will be the ability to identify a problem, design and experiment that might explain that problem, setup and run that experiment, then interpret the results. Perhaps followed up by design a second experiment if the first didn't help.
Save the "follow the recipe" skills for home ec. The most important thing you can teach your student at any level is experimental design.