入学率

入 = 丿 + ㇏ : Mnemonic symbol: an enter key like on a computer keyboard.

There is a special area in the space station's bathroom (Ø4) which is filled with bananas (丿), but you have to hit an enter key (入) to enter (入). Rachel Rhinoceros (ru) uses a finger (㇏) to press the button and get access to the bananas.

学 = 小 + 冖 + 子 : Xu Xian wants to study scienceology and learn more about daisies. Just inside the elevator's kitchen, he put some daisies into a prize cup and covered them with a cooking top. He wants to study the growth rate of the daisies depending on the pH of the water in the prize cup.

率 = 冫 + 十 + 玄 : Sheldon Shrimp (shu) is surprised by a stream of lava (玄) rushing into the airplane's bathroom (ai4). He acts quickly (率) and jumps on a huge cross (十) to save himself. Then he continues to lead (率) the stream of lava around the cross by placing popsicles (冫) on the floor in just the right way, so that the lava passes his cross without melting it. He notices that the heat flow to either side of the cross corresponds to the golden ratio (率).