For a student who don't experience in teaching, it is hard to express and explain. But I have seen tools my teachers used in teaching despite having limited resources.

Writing students' name on a stick for each to be remembered and putting it inside the plastic bag

He randomly pick up three or more stick to make group without looking at it
(class managing)

Using sticks for calculating math to be easy to understand

Drawing pictures each others on papers to know what students are good at drawing (searching talented student)

Giving stones and sticks to students, and building the highest structure with them (For improving their critical thinking skills)

Using the household materials in teaching