Have students draw out flower first. I always tell them to have the petal touching all four sides of the paper. Outline with glue (any glue will work, I just use the school glue). Use pastels to blend in. I have them start with one color, the main color of their flower. Then choose another color for the tips of your petals. It's a messy technique, but the students do a great job of blending and end up with beautiful flowers.