Journals
I ask my students to keep a journal of day to day activities. If I need to know something, I'll leave a note in their journal. If they want to tell me something and don't want to discuss it in front of others, I tell them to write about it and then put it on my desk and I take a look at it. This activity usually gets the discussion going on their terms and it doesn't feel like an interrogation on my part.  They like to write about things and I am here to listen or read in this instance.
Strategy used by ACE Academy teacher Melinda Brock

On-line Resources:

On-line tutorials from McDougal Littell - textbook on-line, quizzes, & other supplementary material at www.classzone.com.

Annette Clark

Teacher Communication:

Maybe try another teacher that teaches the same subject to tutor the student.  Sometimes a different person may explain things differently, and that might open the door to understanding.

Pat Clark

Alternative Assessment:

I have used the alternative assessment method, where if a student has difficulty with a certain kind of test, then he is given another mode of testing, perhaps oral, where he can demonstrate his knowledge in another way. 

Brian Coulter

Grade Replacement:

One thing I have done in the past is the following: 

If a student performs extremely well on a comprehensive test or quiz, I will raise the grade of a previous failing test or quiz grade to indicate mastery.

Susan Blankenship