"Still stuck?" Elena: "I've done it five times. I don't know where I'm wrong." Carlos: "Show me your process."
"You need to check your answer, but not just the final number. You need to see where you slipped." ---- Solucionario Fisica 2 Bachillerato Sm Savia
"You have the solution book? Isn't that cheating?" Carlos (smiling): "It is if you just copy. It's studying if you use it to find your mistake." "Still stuck