WEEK THREE

 

Liberato Cardellini

 

I can call many students by surname.

I started every lesson in this week collecting the problems solved as homework, the filled questionnaire and the concept maps.  Then, I read the results of the correction of the problems, name by name looking for the students and looking at her/his eyes, telling the errors, the good things found in some solutions, commenting about the few that reported the time spent on the task, etc.

After every lesson, I correct the homework, then I send them a message telling them the number of solutions that I have corrected, some advice, the material I have explained and I suggest the problems to be solved.

 

During the week I received 19 messages.  Few excuse themselves because they cannot attend the lesson.  A couple asked what I have done at lesson in a certain day.  Some sent me the compiled test.  The content of other messages:

− What are the products of the reaction between K2Cr2O7 and HCl?

− Thanks for the messages you sent to me, remember me what I have to study and the homework.

− An advice about the way I solved the problems, to have an indications about I have to cope with the problems in the future.

− When I can come to sustain the exam?

− How have I solved the problems today?  Have you already correct them?

− When an organic compound burn down, with who he reacts?

35 students sent to me at least one message.

 

Monday 20: 1.5 hours.

I explained the oxidation number and showed some example about how to assign it to the compounds. Then we start to balance redox reactions.

I have collected 48 concept maps. The number of problems I have corrected from the previous lesson is 281 and the number of wrong solutions and results is 41.

A student get a ‘bonus’ because he has solved problem 5 in an original way, without using mathematical equations o other mathematical ‘tricks’.

 

Thursday 23: Two hours.

In about half an hour I explained the laws of the ideal and real gases. Then we solve few problems and I talked a bit about the importance, for being successful, to study ant to be motivated.

I have collected 14 concept maps.  The number of problems I have corrected from the previous lesson is 476 and the number of wrong solutions and results is 15.

 

Friday 24: 4 hours.

In about forty minutes I explained the geometry of some molecules and the VESPR theory, the structure of hydrocarbons and benzene.  Then we have balanced some redox reactions and solved some problems.

I have collected 23 concept maps.  The number of problems I have corrected from the previous lesson is 318 and the number of wrong solutions and results is 23.

 

 

A window in my office.

Pile of solutions: 702 from the first week + 1,075 = 1,777.