NYS Common Core Standards for Mathematics : This website was designed by New York State for educators to find the standards for each grade level as it pertains to mathematics. This site provides the outcomes that students should reach by the end of every grade in order to master mathematics.
Wolfram Alpha: This website offers students, teachers, and any person who is interested in mathematics a way to see the solution to the math equation. This application allows for anyone to input any equation whether it be 5 + 2 or 5x + 3 =? or even more complex and it will give the person the solution with steps.
NCTM - National Council of Teachers of Mathematics: This site provides teachers and preservice teachers with a wide variety of teaching resources. NCTM puts out a journal with information about how to improve how teachers teach mathematics to their students for any grade level. The NCTM also has resources that align with the NYS Common Core Standards that can be used within the classroom. Another point to make about the NCTM is the professional development conferences offered all over the United States of America.