Corrections are very important but when to make these corrections is even more important. Here are few tips for delayed corrections.
Walk around the classroom while the students are doing an activity, listen carefully to the students and make notes of students’ error as you monitor.
If it is possible don’t do any kind of corrections during the monitoring; corrections distract learners from the task. Be “invisible” during monitoring.
It is a good idea to classify the mistakes, for example: grammar mistakes, punctuation mistakes, spelling mistakes, pronunciation mistakes etc, according to the purpose of the task.
Write on the top right the grammar errors and in the top left the pronunciation errors. This technique helps both, the teacher and the students.
Use different colors for different kind of errors. This might be combined with the previous tip for a greater result.