How to Measure Volume of Liquid in different containers

The example of 3 beakers with different volume of liquid

For low achiever... 1. Teacher asks pupils to bring a bottle of mineral water and two different size of transparent containers. 2. Pupils pour the mineral water into two different containers and measure the level of the water.(Teacher puts some colours to the water.)      it looks like the bigger glass holds less water than the smaller glass. 3. Pupils definitely will tell that the smaller glass holds more water if we measure it. 4. Ask pupils to pour the water into the measurement beaker. 5. Now, teacher can show the pupils, how to measure the volume of liquid. Not to looks at the level in different container but by using the standard measurement.