We all need to make some contribution to our society. As a teacher, you have done your best for your students. The whole class was very instructive and exciting as a math lesson. Such assignments and group work will go a long way in helping children develop the ability to do accounting with joy.

Here @BlackHatCoiner and deserves praise. His "testnet faucet" was used for teaching purposes. I also appreciate his service especially for the Lightning faucet, it is also a very instructive initiative for newbies.