make sure to — used to emphasize that someone must remember to do something or ensure that something happens

a caring mother kneels down and carefully checks her child's backpack one more time. She points to each item inside while the child watches attentively. The mother then zips up the backpack and helps put it on the child's shoulders. She gives a reassuring pat and thumbs up gesture to confirm everything is ready. Other students and parents move through the hallway behind them preparing for the school day. The child smiles confidently knowing everything has been double-checked. someone making sure that everything is properly prepared and nothing is forgotten