Lesson plans from the SMARTExchange to be used with the Everyday Math Curriculum. This search was done for 1st grade but can be done with any grade level. They are sorted by Unit and Lesson.
ReadWriteThink has activities designed from grades K-12. You can sort the activities based on what grade level you are looking for. It has activities such as word sorts, venn diagrams, poetry helpers, and many more literacy activities to be used whole class on an interactive whiteboard or individually.
EducationCity is a subscription website that features games for grades K-6 in math, language arts, and science. With the subscription, students can keep track of their progress in the games with the "success tracker", and then the teacher gets a compilation of student scores, broken down by subject and graphed to show how they are doing. It can be used individually with students, or in the "Interactive Whiteboard Mode" whole class/small group.
BrainPop Jr. is in the BrainPop family of websites. It features educational videos on a wide variety of topics, from health to math and literacy. Students love watching the videos, and then it includes followup activities, such as quizzes, games, and even jokes. It requires a subscription for some videos, but others are free.
A compilation of SMART lessons from a school district in Wichita. The lesson plans are categorized for K-8th grade and address a wide range of subject areas. There are also lessons to be used with a Senteo. All lessons can be downloaded.