Various methods can be used to measure a child's temperature: - Rectal thermometers: Considered the most accurate for infants and young children. - Oral thermometers: Suitable for older children who can hold the thermometer under their tongue. - Axillary thermometers: Used under the arm, but less accurate. - Tympanic thermometers: Measures temperature inside the ear, convenient but may be less accurate if not positioned properly.