I think the best way to teach is to actually use it and experience it; and I think the best wallet to do that is Sparrow wallet. You can click the UTXOs tab on the left of each wallet / account to see all your spendable coins. You can also add labels to your coins, view the address the coins are sitting on, the coin's amount, and other relevant information. You can also send transactions and preview the flow of the proposed transaction in a very intuitive diagram. You can also look at old transactions and review to see the same intuitive flow diagram that show exactly what happened in a transaction. Sparrow is very well designed, very intuitive, and I think it's not only a great wallet to use, but also a great wallet to use to teach many bitcoin concepts.