An RDAS science lesson is not reading through chapter seven. It is a directed inquiry: start from a real question, make a guess, test it by hand, let the data decide, and revise when wrong. The path below runs underneath every lesson. Here it is, walked from start to finish through one example.
A Real RDAS Investigation
"How do you make a paper parachute fall the slowest?"
The same sheet of paper, cut to different sizes, with different holes, released from the same height. Which one drifts down longest? Children design a fair comparison, build it, time it, plot the data, and say clearly what makes one fall slowly.
1
Begin with a real question
No answer is handed over. A question that makes you pause comes first, and once a child is curious, the lesson can begin.
Asking a testable question
2
Guess first, in writing
Before touching anything, each child commits to a prediction and a reason, in writing, so it can be checked against the result later.
Making a reasoned prediction
3
Design a fair test
To find out whether size matters, change only the size and hold everything else the same. This step is the line between science and what merely sounds reasonable.
Controlling variables
4
Into the lab, hands on
Cut, fold, assemble, release. At RDAS, science and lab go together: an idea has to pass through the hands before it truly lands. Safe handling is learned here too.
Working safely, hands on
5
Observe and measure
A stopwatch times the fall, several runs each. Children learn to use the right tool and turn observation into numbers.
Measuring systematically
6
Record the data, plot it
Numbers go into a table and a graph, and the pattern jumps out: the bigger the canopy, the slower the fall. Method and results are recorded so anyone can repeat it.
Recording & presenting data
7
Analyze, conclude, check the guess
Look back at the prediction: right or wrong, and why? Children explain it with air resistance, and watch for any odd outliers.
Concluding from evidence
8
Revise, ask the next question
"What if we cut a hole?" "What about a heavier weight?" One investigation ends and the next question appears. Science is a path that keeps correcting itself and keeps asking.
Evaluating & improving
