The most difficult math subject for me was working with integers. My sixth grade teacher was really helpful supplying us with techniques to help us remember the rules. For example, she told us: Same signs, add and keep; different signs subtract. Keep the sign of the higher value then you'll be exact (to the tune of Row, Row, Row Your Boat). This year, our teacher told us if the signs are the same you add the sum (both start with S) and if the signs are different, you find the difference (both start with D). 
    When multiplying or dividing, if the signs are the same, it's positive. If they're different, it's negative. Pretty simple. 
Examples:
-4+(-9)=-13
-9-(6)=-15
9*-9=-81
30/-6=-5

    Square roots are numbers that multiplied by that same number. For example: 7x7=49. It has to be the same number multiplied by its self. It can't be 7x6=42. Some of the numbers are: 1x1=1, 2x2=4, 3x3=9, etc. 
    Another possible name for square roots can be roots squared. It's pretty close to the original name, but it still makes since. Using big numbers to find the square root can get difficult sometimes. The square root can also be a decimal. 
    Square roots are easy, but it involves a lot of math. A calculator is allowed by the teacher to find solve long problems.