You could switch metronome on, to set your speed, and start counting aloud. Keep counting, (1...2...3...4...) and start to play. You could also stamp you feet. If this doesn't work then just keep practising with the metronome on until your teacher tells you to stop.
John 3:16
For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.