In the past I have taught this lesson with 5th grade, but this year I have decided to try it with my 4th grade artists. Most of them have done an amazing job making careful drawings from observation, but for those who are struggling I have made this little demo video. Its actually the first time I have ever recorded myself drawing. I made a makeshift camera stand using a plexiglass frame and two canisters, so its not the best, but it will do the job.
Here is the video:
And if you are interested in the lesson plan, you can find that here: Pine Cones Lesson Plan