Which classroom assessment strategy would you as a teacher prefer? and why?

Performance-based: performance, exhibition, demonstration, presentatio. I think it is more effective. 

The golden rule for school teachers is to make students as expressive as possible.speaking,writing are two major points to assess.so i still support the traditional paper test,objective and subjective both.

Class performance,group behavior,project handling and team spirit are other parameters which help in fair all rounded assessment.

Productive Study: Students keep a record of how much time they spend studying for a particular class, when they study, and how productively they study at various times of the day or night. This allows faculty to assess the amount and quality of out-of-class time all their students are spending preparing for class, and to share that information with students

students as expressive+paper test,objective and subjective both.+presentation of students+ Question and Answers from selected students, for  checking the learning out come of students,

teacher use different techniques in the class room situation,  both improving  receiptive and productive skills

But the new assessment technique teacher use in class room is  presentation in group work,   at the end he asks Questions

All of them are usefule because each one has its suitable use in a particular time during thae class.

All of them are good in various proportions and considerations

Its depends upon what I have to measure, vif I want to judge the personality it must be personality based, if I want to measure students formal learning outcome may be summativ and formative assessment, may be diagnostic test to check learning issues or sociometric techniques to assess the social skill of the child among groups.

Personally for me - learning outcomes are only as good as its application in real life situations.  So, if given the choice - I would prefer to give them real life scenarios and show them plenty of examples to apply their ESL language knowledge demonstrate their knowledge and skills.