2026–27 · Backup lesson · Spring 2027
Investigate Root Anchoring with a Simple Model
Adult extension of: How Roots Hold On
Unscheduled alternative · available resource
Observe root and stem structures, then compare two models under the same starting conditions. Use the evidence to explain anchoring while recognizing what the model cannot tell you about a living plant.
Curriculum skill focus: Cause-and-effect, resistance/force, observation, fine/gross motor control
01 · Learning
Objectives
- Distinguish a root from a stem using an identified plant image or contained specimen.
- Compare model anchoring while keeping starting depth and surrounding material alike.
- Report a result and one limitation without turning the task into a strength contest.
02 · Preparation
Materials
A known potted plant with a root image or contained visible roots; two identical short thick plant models, one with broad felt root strips; a stable tray of soft cloth layers; root and stem labels; comparison sheet; usual communication supports.
03 · Practice
Adult project
- 1
Observe the known plant or image and trace from stem to roots. Label the two structures and discuss a practical question: what helps a plant remain anchored while it also takes up water and nutrients?
- 2
Inspect the two short models and identify the planned difference: one has spread-out felt strips and one does not. Agree to keep the cloth layers, starting depth and gentle lifting method alike; choose observing, directing or one supported trial.
- 3
Predict whether the models will hold more, less or about the same, giving a reason if you wish. Record the prediction before testing, and check that the facilitator has stabilized the tray.
- 4
Lift each model gently from the same starting depth while the facilitator controls stability. Describe the observed movement or resistance without measuring anyone’s strength; stop if a model sticks or the movement is uncomfortable.
- 5
Compare prediction and result, then choose whether one repeat would help check the observation. Keep the same setup and note uncertainty or a changed result rather than forcing agreement with the prediction.
- 6
Complete the record with the observation, the controlled conditions and a limit of the model. Connect it to careful plant handling: observe or support a root ball rather than tugging a living plant, then restore the models and clean hands if plants were handled.
Evidence & interpretation
What the investigation shows
Roots help anchor plants and take up water and nutrients. Felt strips in cloth model one aspect of anchoring, but they do not measure the strength, growth or water uptake of real root systems.
Practical connection
Why this work matters
Useful for understanding plant anchoring, handling transplants carefully and practicing fair comparisons during garden investigations.
Participation by choice
Individual access options
- Use enlarged root diagrams and a facilitator demonstration without touching soil or pulling a model.
- Direct the test and record more, less, same or uncertain through speech, signs, gaze or usual AAC; motor participation is optional.
- Choose a seated position with the tray in a comfortable visual field, and use only a familiar approved movement if trying a model.
Review & transfer
Reflect on the work
- What did the comparison show, and did a repeat change your confidence?
- Which part of a real root system does the model represent, and what does it leave out?