Play a sample game with the students so they learn the game. Invite them to pudding shuffle the cards with you.
After the cards are straightened back into a deck, they are divided in half in one clean split, not divided one by one. The piles don’t need to be exactly equal. This is quicker and emphasizes that the game isn't about trying to win the most cards.
The two stacks are placed face down in a pile across from each other. Divide your students into two small groups. Ask two students from each group to take the top card from their pile and place it face up between the piles. If needed, keep guide cards in close view.
Whoever has the larger card wins both cards. Teach them how to pull the two winning cards close to themselves, leaving them face up in a pile on the floor. This is important for later when you are watching many pairs of students.
You will have a moment more to see if the play was done correctly than if those two cards are turned face down.