Great lesson done with my 7th grade class but could also be done by 5th graders.
Cloud types include
10-15 min vocabulary review (students are given the vocabulary to copy down from powerpoint)
10-20 min Gallery walk where students must decide what cloud is in the picture or what cloud is on the slide by reading the description. (students record answers on the bottom half of the note sheet from earlier)
15-20 min class review of answers.
You simply need to print out the slides and post them on your wall. ( I print 2 slides per sheet and cut them in half.)