In hot bath: if solid dissolves then it is soluble; if some dissolve then it is slightly soluble, additional of solvent needs to be added. When solids are dissolved, they are to be cooled down. Reheat the test tubes, addition of solvent if necessary. Cool down when solids are dissolved. Leave these test tubes undisturbed and record data and observations. Repeat overall process for the other test compounds. Make another set, place in cold condition. Choose the best crystals formed throughout the whole experiment. So then we soon enough will be able to cool and have a new M3 card.