These are in alphabetical order. Choose well based on level of difficulty and abstractness. Teach intraverbals (no visual cues, I say "cold" you say "hot"), intraverbals (no visual cues, I say "cold", you write "hot"), intraverbals (you read "cold", you write "hot"), visual-visual non-identity matching (with 2 pair on the table place corresponding cards together "cold" with "hot", pictures or words), auditory-visual non-identity matching (with 3 or 4 cards on the table, I say "cold", you select "hot", picture or word).
