Here are some more ideas to get you started.
Engage the fives senses (whenever possible)
Make leaf prints ( paint the leaf and press the print into the journal)
Make leaf rubbings
Trace the items they are looking at
Add leaves into the journal using tape
Count the birds/squirrels/insects etc.
Measure as much of the phenomena as the students can using non standard and standard units of measurement.
Here is a downloadable lesson from John (Jack) Muir Laws and Emilie Lygren book: How to Teach Nature Journaling. All resources shared with permission. "I Notice..., I Wonder...?, It Reminds me of..."
GIVING FEEDBACK here is a fantastic resource from Jack and Emilie
NOTE: You are encourage to spend time in the outdoors Nature Journaling. However, you can also bring nature inside, look out your wonder window, have a refrigerator Safari or even observe a house plant or pet.
How will you know they’re different from one another? Some ideas: look at the leaves, the shape of the tree or plant, the flowers that are growing on it.
You can even walk around inside and tally different kinds of plants in your home (don’t forget to look inside the fridge!). Make drawings of the different leaves or plants.
Once your tally is complete, count how many different plants you found. Are you surprised by what you discovered? You studied a natural community or group of living things. Now think of your family and school community. Can you describe some of the differences between people in your community and the activities they participate in?
NOTE: This can be used with the Nature Journaling activity at the top of the page.