Practice this song on your recorder. When you're ready, play it during or after class to earn your love belt. Take your time and practice slowly. Use the track to keep your tempo steady.
Look at the fingering chart to understand how to play the high D sharp.
A natural sign "erases" sharps and flats for the rest of the measure. In the first full measure, the natural sign before the last D "erases" the sharp from earlier in the measure, making that D a regular, or "natural" D again.
Video coming soon