FlaskFiller — on Measuring Cups and Graphs


FlaskFiller is an educational web application for 5th and 6th grade. Using FlaskFiller students are able to fill up virtual glasses, like a highball glass, a lemonade glass, a cocktail glass, and an Erlenmeyer flask. We can describe the filling of a glass with water using two quantities: the volume of the water in the glass and the height of the water level in the glass. And, of course, time is also changing during the whole filling process.

FlaskFiller enables students to explore the relationship between volume, height, and time in this situation of change. To explore students have two tools: creating a measuring cup of the glass and drawing a graph. The measure lines are invisible when the microworld is started, you enable them by clicking the Button to enable/disable the measure lines-button. The measure lines given can be dragged onto the glass. When running the simulation, students can check if they have positioned the measure lines correctly. When the lines are positioned incorrectly students are invited to think about the situation some more. The simulation of the filling of the glass is controlled by the start button (The start button), the pause button (The
    pause button) and the clear all (in Dutch Leegmaken) button (The clear all button).

After studying the relation between volume and water level height, students can express that relationship by drawing a graph. Click the graph button (The graph button to enable/disable graphing) to enable graphing. In this empty graph a student can:

The students can check their graphs by running the simulation of filling the glass again after enabling the automatic graph tool by clicking the Automatic graph tool-button. Again, seeing their own work and the correct graph drawn by the microworld, students are invited to think about the differences and what those differences mean in terms of change.

For some of the pupils it might feel strange to not study change in relation to time. Besides the relationship between volume and height, the relationship between time and height can also be taken into account. To change to time, click the time-button (The time
        button to activate time (instead of volume)). A timer will appear and the student can draw time verus height graphs.

FlaskFiller can be easily reset by refreshing the webpage (shortcut F5).

FlaskFiller is designed for Dutch primary education and the interface is in Dutch. On the other hand, text is only sparsely used in FlaskFiller.

For questions and remarks, please send an email to the designer and programmer of FlaskFiller: Huub de Beer.