The basic steps for primary school students to grow mung bean sprouts are as follows:

1. Prepare mung beans and planting containers: select plump mung beans and wash them with water. Then, choose a container suitable for growing mung beans, which can be a plastic pot, glass pot, or ceramic pot, etc. Make sure the container has drainage holes.

2. Soak mung beans: Soak mung beans in water for about 8 hours until they become slightly swollen.

3. Planting mung beans: Drain the soaked mung beans and distribute them evenly in the container. Spread a layer of wet paper towels or damp cotton or cloth on the surface of the mung beans to maintain humidity. Finally, cover the container and place it in a warm, dark place.

4. Care for mung bean sprouts: Open the container every morning and evening, rinse the mung bean sprouts with water, and maintain the humidity in the container. At the same time, avoid letting sunlight shine directly on the container to avoid affecting the growth of mung bean sprouts.

5. Harvest mung bean sprouts: When mung bean sprouts grow to a certain length, they can be harvested. Use tweezers to pull up the mung bean sprouts one by one, rinse them with water, and then they can be used for cooking.

Notes on growing bean sprouts:

1. Maintain humidity: Bean sprouts need sufficient water and humidity to grow. During the planting process, water the bean sprouts regularly and maintain the humidity in the container. Too dry soil will affect the growth of bean sprouts, while too wet an environment may cause bean sprouts to rot. Therefore, appropriate watering should be carried out according to the degree of dryness and moisture of the soil to keep the soil moist.

2. Control temperature: Bean sprouts need a suitable temperature to grow. Too high or too low temperature will affect the growth rate and quality of bean sprouts. Growing bean sprouts is a simple matter. Therefore, when growing bean sprouts, choose a warm, well-ventilated environment and keep the temperature suitable.

3. Maintain humidity: Bean sprouts need sufficient water and humidity to grow. During the planting process, water the bean sprouts regularly and maintain the humidity in the container.

4. Avoid direct sunlight: Bean sprouts do not need too much sunlight to grow. Too much sunlight will turn the bean sprouts green and affect their taste and quality. Too dry soil will affect the growth of bean sprouts, while too wet an environment may cause bean sprouts to rot. Therefore, appropriate watering should be carried out according to the degree of dryness and moisture of the soil to keep the soil moist. Therefore, when planting bean sprouts, avoid direct sunlight on the container to avoid affecting the growth of bean sprouts.