The ability to visualize diagram molecules start with drawing their Lewis structures.
This is why ChemistryNinja made this fill-in-the-blank Lewis Structures lesson plan for Chemistry teachers. These notes first introduce dot diagrams and then progress to teaching students how to draw Lewis structures, isomers, and how to identify common functional groups. Many examples are interspersed throughout the notes for students to practice drawing dot diagrams to molecular structures. Pair this lesson with the VSEPR & Polarity, and the upcoming Bonding & Intermolecular Interactions fill-in-the-blank notes, and you'll be set!