Lesson blows up. Students don't understand the topic. Key pieces of information missing from the students previous knowledge. Bottom line... you are going to need to figure out "on-the-fly" lessons to help the students. This video will give you some tips to help you survive.
1:47 Tip 1 - Use factors of 24 & 30 when adding fractions
2:44 Tip 2 - Avoid having Improper Fractions in the sum.
3:40 Tip 3 - Greater than 1/2 minus less than 1/2
4:06 Tip 4 - Use factors of 100 in the denominator when converting to decimals
5:07 Tip 5 - Use factors of 100 when working with percentages
5:32 Tip 6 - When dividing decimals use basic division as your guide
6:18 Tip 7 - When making circle graphs use factors of 360
7:25 Tip 8 - When making triangles use the pythagorean theorem
10:06 Tip 9 - Using (2 of 3) rate, amount & multiplying to create multiple problems
11:47 Tip 10 - Creating Equations