arXiv:1401.3061

Easy Java Simulation, an innovative tool for teachers as designers of gravity-physics computer models

Teachers designing gravity models with EJS

EJSGravityTeacher Design

Easy Java Simulation, an innovative tool for teachers as designers of gravity-physics computer models — Gravity models let students test hard-to-see orbital and field relationships.

Research Digest

This paper argues that teachers can be designers of physics models, not just users of software. Gravity is a strong context because learners can manipulate parameters and compare motion that is otherwise hard to observe directly.

Use It Tomorrow

Use a gravity model to ask: what changes when mass, distance, or initial velocity changes? Then connect the visual output to Newtonian reasoning.

Pedagogical Move

Let teachers edit or extend the model so the tool matches the exact learning objective.

Student Agency

Frame the task so students work like young scientists: they choose or justify the variable to test, make a prediction, collect evidence, defend a claim, and decide how to improve the model or investigation.

Discussion Prompts

What evidence does the model, video, or activity make visible?
Which variable should students change first, and what should they keep constant?
What claim can students make from the evidence, and what limitation should they acknowledge?

Reveal suggested answers

Evidence: The gravity model makes motion, field effects, parameter changes, and student predictions visible in a way real classroom observation cannot easily provide.
Variable: Change a gravity-related parameter such as mass, distance, or initial velocity first; keep the learning goal and comparison setup fixed.
Claim: Students can claim how the chosen parameter affects gravitational motion, while acknowledging that teacher-designed models deliberately simplify reality.