Dare to Differentiate This page gives tons of samples of differentiated choice boards and tic tac toes. It has many different subjects and a wide variety of levels available. This is my favorite site for helping teachers differentiate! There are also many additional topics on the left side tool bar such as RAFT assignments, tiering instruction, using technology and much more!
Differentiation Central This page has a variety of resources including some sample lessons for each grade level.
We Give Books This page has books that you can put up on a SmartBoard, on individual computers or on an Ipad.
Think-Tac-Toes This page has some sample Think-Tac-Toe activities for 1st - 4th grades.
Anchor Activities This page has examples of anchor activities, brainteasers, logic puzzles and links to pages with more.
Differentiation Myths and Truths A great article that talks about common misconceptions about differentiation.
Differentiation Central Videos This link takes you to videos about differentiation, many from Carol Ann Tomlinson, who is a differentiation guru.
Flexible Grouping The advantages and disadvantages of different types of grouping.
Excellence for All A very interesting article about understanding that one size doesn't fit all even if you are teaching to the top.
What Does it Mean to be Smart?
Motivating Gifted Learners 10 suggestions for motivating gifted children.
Differentiation This page has a plethora of information about general differentiation.
Meeting the Needs Bertie Kingore did a lot research about giftedness and, in fact, our current 2nd grade portfolio assessments are based on her research. Here are articles that she published about meeting the needs of gifted learners.
Carolyn Coil's Blog She covers a lot of topics such as differentiation, creativity, gifted students, and assessment.