Mother natures runs the show here but only when it comes to subjects like P.E. and Science. We have two seasons here - the rainy season and the dry season. All P.E. drills take place out in the school yard as long as the sun is not being upstaged by clouds and it did not rain the night before (can't handle the mud!).
For science, I have to time my experiments carefully. I may live in the tropics but it doesn't mean that I get the right fauna available at any given time. When certain flowers are in bloom, I am reminded that it's time for me to teach about the parts of a flower. I usually ask students to pick a hibiscus flower in the morning before they come to school to keep the flower fresh. I love to have students cut open and pick apart the hibiscus flower with plastic knives. Other flowers are suitable but for me, I prefer the hibiscus because it is very common and the layout of the flower is very simple.
When the rainy season is coming to an end, I teach about hard water and soft water. The students collect samples of tap water, river water, sea water, rain water and spring water. This way, the students are able to collect the rain water when it rains and also collect clean river water. If they do this in the middle of the rainy season, the river water would be very brown from the erosion of soil particles. But when that happens, it's a good time to teach about erosion and flooding!