why students can't see their scores after finnish lesson?

Hi Phạm,

That happens because there is an open question in the worksheet, for example your worksheet "6_Bài 8. Quan hệ chia hết và tính chất" contains an open question that counts for the final score in the first table of the worksheet.

When a worksheet has an open question student can't see their grade until you have corrected the submission.

If the question should not be open, please define a correct answer and your student will be able to see their grades inmediately.

Thank you; I can do it