I am a big fan of StudyLadder. Many of our teachers in elementary and the middle school are utilizing this excellent resource. It is a multi-subject interactive site that allows you to differentiate for all levels of students through grade six. With the ability to import entire class lists, you can set up individualized, interactive work for your students. What I especially appreciate about this site is the color coded leveling. While teachers are shown which color represents which grade level, the students are not. In addition, StudyLadder is Common Core aligned.
Road to Grammar is a free resource featuring quizzes, games, and lessons for English language learners. Visitors to Road to Grammar will find more than 300 grammar quizzes on the site. Each quiz provides instant feedback and notes to explain why an answer is correct or incorrect. Before taking the quizzes visitors can work through a dozen practice activities and five practice games.
Road to Grammar Jr. is the companion site to Road to Grammar for younger students. The words and phrases on Road to Grammar Jr. are chosen for use in elementary school.
QR Voice is a free tool that allows you to create QR codes that when scanned will play a short audio message. To create your message and QR code you can record a voice message by clicking the microphone icon on QR Voice or you can type in your message. Either way you're limited to 100 characters. QR Voice is offered in Spanish, English, Japanese, and Portuguese.