We created these decision trees to instruct a non english speaker on which lawn care product to use. The circumstances depended on whether or not it was below or above 90 degrees, whether the ground was wet or dry, and whether or not it was infested with insects. The first decision tree that I drew I used arrows going up and down next to the 90 to show whether it was above or below, I then changed this to a thermometer with the temperature either above or below the 90 mark. This seemed easier for someone looking incase the arrows were confusing. I used rain drops with an x through them and sunshine to infer that it was dry and then just rain drops to show wet. For the insects I simply drew little bugs because they are pretty universal in all languages as is the sun and rain. When I did this the first time I had everything lined up left to right with plus signs between the images and an equals sign before the lawn care product to use. I changed this to a grid because it takes away the confusing plus and minuses and allows the reader to read from left to right. I liked this decision tree however the process itself was frustrating because you can't really infer what people will know and understand so it's hard to find the right images to use.