These sites off the students a chance to practice their grammar skills in an interactive way. Three of the sites are completely interactive while the other site offers the children information, but little interaction.  The sites levels of questioning are low-level.  However, in order to complete the games the students must apply the knowledge that he or she has learned.  I would use these sites for whole group, small group, remediation, and independent practice.  These sites are useful for all of these instruction types.