Science & Technology

Keep a rain gauge, log what falls, and turn a season of numbers into a planting decision.

Size a panel, charge a battery safely, and light a room without burning paraffin.

Follow a signal through a circuit, find the dead stage, and bring a set back to life.

Test pH and salinity with a kitchen kit and decide what the plot actually needs.

Check a source, build a slow sand filter, and prove the water is safer.

Keep a shared phone running, download lessons once, and send work when the signal returns.