In the morning, he taught a few Olympiad math classes at the Yieta Magic Academy. In the afternoon, he went to the Halfling Workshop to check on the progress of the airship production. As for the evening, he did some advanced math problems and practiced the newly developed magic [Liquid Nitrogen-Ice Field].

I have to say that doing exercises is still somewhat useful. The growth rate of my mental strength is much faster than before. The only drawback is that when I go out every day, I feel a little nervous.

The teaching progress of the Olympiad mathematics class was also faster than Lin En had imagined. After just four days, a single exponential summation formula could no longer satisfy the appetite of those wizard apprentices.

They are all looking forward to more complicated Olympiad math problems!

Lin En had no choice but to use his second killer weapon, which was the square root!

If exponential growth is considered difficult for these wizard apprentices, then square root extraction is a pure nightmare!

The students who had been looking forward to the new content suddenly wailed. Whenever someone passed by the Olympiad classroom, they could always hear some strange words coming out of it.

"No, I can't open it, I can't open it..."

"Impossible, this isn't my fault, there must be something wrong with the formula!"

“This question has no solution at all!!!”

…

After only two days of the course, Alok and the others said it was too difficult, unbearable, and they couldn't get the square...

The so-called long division method and continued fraction method were all used, but more than half of the students still made slow progress.

A new term has even been circulating in the Iyeta School of Magic, called "Professor Arcana's smile." It is said that once Professor Lynn smiles, no one in the entire classroom will be able to laugh anymore!

Lin En was helpless about this. Even square root was so difficult to learn. He would go crazy when he learned calculus in the future...

In the next few days, he could only start teaching from geometry. Considering that everyone's learning progress was different, he even divided the class into elite and ordinary classes...

After finishing a new Olympiad math class, when Lin En was about to go out, he was blocked by Philip.

"Professor Lin En, the Wizarding Council and the commissioner of Magic Weekly will come to Yieta Harbor in the next two days. You'd better prepare in advance!" Philip reminded.

"Is it for the law of free fall?" Lin En was a little surprised at first, but he quickly reacted.

"Yes, and your planetary theories. Master Hellram has already reported them, but whether they will be published depends on the specialist of Magic Weekly." Philip nodded.

"What about the Wizarding Council? What did they send people for?" Lin En asked curiously. It shouldn't be the same thing.

"They are here to assess your wizarding level!" Philip explained.

Generally speaking, if it is confirmed that a foreign wizard will stay in the wizarding land for a long time, the parliament will send someone to confirm the other party's identity and wizard level. In addition, there is a period of observation. If it is determined that the foreign wizard will not pose a threat here, he will be issued a formal wizard badge and robes.

Seeing that Lin En looked a little worried, Philip hurriedly comforted her. "You don't need to worry too much about this. You are well-versed in Mathematics. You will definitely have no problem passing the observation period."

Lin En nodded. In fact, he was not worried about the observation period. After all, he was not planning to do anything bad in the wizarding land.

What really worried him was the formal wizard evaluation.

When he joined Yieta College, Hellram did not test his wizard level. Lin En thought that the other party had already acquiesced. He did not expect that this thing was actually assessed by the parliament.

Even though Lin En has been working intensively for the past half month, it still takes several days to reach the limit of magic power growth. That is why he has not been in a hurry to obtain the [Source of Magic Power].

"In the land of wizards, how is the level of wizards determined?" Lin En asked tentatively.

"Generally speaking, magic balls are used to test wizards from the first to third rings, and there will be little chance of mistakes. Of course, if you are a great wizard, that thing will naturally be useless." Philip joked cheerfully, and then curiously asked how the levels were assessed in the [Arcane Society].

"In the [Arcane Society], there are only scholar levels and no strength ratings. Identity is not important. The only thing worth exchanging is knowledge." Lin En said nonsense.

Hearing this, Philip couldn't help but feel yearning. Perhaps only in such a place could a formal wizard like himself communicate with a great wizard or even a legendary wizard on an equal footing, and tell his own views and conjectures about the world...

"So what are the requirements for joining the [Secret Society]?" Philip lowered his voice and asked quietly. According to Lynn, the [Secret Society] should only be a small group that exchanges knowledge with each other and will not force members to do something they don't want to do. Joining such a society seems to have only benefits and no disadvantages.

"You must first hand over a new piece of knowledge to prove your ability, and you also need a recommendation from a higher-level person." Lynn patiently added to the lie and stated that after coming to the land of wizards, he temporarily lost contact with the [Society of Secret Arts], so that Philip would give up the idea.

After all, there is no such thing as the [Mystical Society] in the Sekas Empire. He can't conjure one up, right?

After some deception, Philip left with some regrets, and Lynn secretly breathed a sigh of relief. Although the lies he had made up to deal with Hellram's criticism had brought him a lot of convenience, they had also caused a lot of hidden dangers.

While Lin En was thinking about the strategy in his mind, he walked towards the Half-Body Workshop to check the progress of the airship's production.

As soon as she stepped into the door, Lin En bumped into Lydia who was running out in a hurry.

If we only look at the height, it would be like a dwarf bumping into a giant, but the result was just the opposite. Lin En took several steps back before he could steady himself and avoid falling to the ground.

Lydia looked fine, and excitedly grabbed Lin En's arm and dragged her inside.

"Come with me, Professor Lin En..."

After working overtime day and night for more than half a month, their airship has been completed ahead of schedule! (PS: Please support the new book.) (End of this chapter)