After viewing the RTI video, briefly describe what happens at each RTI tier. Which tier do you think is the most challenging to implement? Why? What might be done to improve the success of the tier you selected as most challenging?For your discussion board first postings, your thread must be at least 10 lines of text or 245 words in length and reference at least two course resources—readings by page number, video by title, or Power Points by slide number. An additional out of textbook/BB resource citation is also required for the highest score possible for each discussion board.Link to video:https://www.youtube.com/watch?v=nkK1bT8ls0M

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